ZZ-EFEM/Framework/RTEquipmentLibrary1/HardwareUnits/OcrReaders/IOSS/110/Wid110Lib.cs

// ============================================================================
// Copyright (c) 2010  IOSS GmbH
// All Rights Reserved.
// ============================================================================


// ============================================================================
//
//      Wid110Lib  -  WID110 C# based library
//
// ============================================================================
//
//      File:     Wid110Lib.cs               Type:         Implementation
//
//      Date:     05.02.2010                 Last Change:  09.11.2011
//
//      Author:   Thomas M. Schlageter
//                Silvio Robel
//
//      Methods:  Wid110Lib             -  constructor
//                ~Wid110Lib            -  destructor
//
//                FCreateDll            -  create WID110Lib instance
//                FDestroyDll           -  destroy WID110Lib instance
//                FExit                 -  terminate connection and exit
//                FGetCodeQualityBCR    -  get code qualitiy for BCR codes
//                FGetCodeQualityDMR    -  get code qualitiy for DMR codes
//                FGetCodeQualityLast   -  get code qualitiy for LAST code
//                FGetCodeQualityOCR    -  get code qualitiy for OCR codes
//                FGetErrorDescription  -  get error description
//                FGetLastError         -  get the last error number
//                FGetVersionParam      -  return sensor/interface version
//                FGetVersion           -  return library version
//                FGetWaferId           -  get the last BCR/OCR decode result
//                FInit                 -  initialize library and connect
//                FIsInitialized        -  check for initialized state
//                FLiveGetImage         -  take single image with parameters
//                FLiveRead             -  perform a live read
//                FLoadRecipes          -  load parameters by sending a file
//                FLoadRecipesToSlot    -  load parameters by sending a file
//                FProcessGetImage      -  get image from process trigger
//                FProcessRead          -  perform a process read
//                FSwitchOverlay        -  switch overlay on/off
//				  FGetCodeTime		    -  get certain time parameter
//
//
//      Auxiliary methods:
//
//                getErrno              -  get error number
//                getLastExcp           -  get the last exception message
//                getReadOK             -  get result read state
//                getTmpImage           -  return temporary image name
//                isException           -  return exception state
//
// ============================================================================


using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Reflection;
using System.Text;
using System.Runtime.InteropServices;


namespace MECF.Framework.RT.EquipmentLibrary.HardwareUnits.OcrReaders.IOSS
{
    public class Wid110LibV7
    {
        // ====================================================================
        /// <summary>
        /// Private member variables.
        /// </summary>
        // ====================================================================

        private string version;
        private string versParam;

        private string tmpImage = Wid110LibConstV7.tmpImage;
        private string lastExcp;

        private int errno = Wid110LibConstV7.ecNone;
        private int readOK = Wid110LibConstV7.rcError;

        private IntPtr dll;


        // ====================================================================
        /// <summary>
        /// Imported method prototypes.
        /// </summary>
        // ====================================================================

        [DllImport("wid110Lib.dll")]
        public static extern IntPtr FuncCreateDll();

        [DllImport("wid110Lib.dll")]
        public static extern int FuncDestroyDll(IntPtr objptr);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncInit(IntPtr objptr,
                                           string cpIPAddress);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncIsInitialized(IntPtr objptr);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetVersionParam(IntPtr objptr,
                                                      StringBuilder cVersion,
                                                      int nMaxLen);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetVersion(IntPtr objptr,
                                                 StringBuilder cVersion,
                                                 int nMaxLen);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncSwitchOverlay(IntPtr objptr,
                                                    int bOnOff);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncExit(IntPtr objptr);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncLiveGetImage(IntPtr objptr,
                                                   string cpFileName,
                                                   int nChannel,
                                                   int nIntensity,
                                                   int nColor);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncLiveRead(IntPtr objptr);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncLiveGetImageRead(IntPtr objptr,
                                                        string cpFileName,
                                                        int nChannel,
                                                        int nIntensity,
                                                        int nColor);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncProcessRead(IntPtr objptr);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncProcessGetImage(IntPtr objptr,
                                                      string cpFileName,
                                                      int nTypeImage);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetWaferId(IntPtr objptr,
                                                 StringBuilder cReadId,
                                                 int nMaxLen,
                                                 IntPtr bReadSuccessful);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetCodeQualityOCR(IntPtr objptr,
                                                        IntPtr pnQuality);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetCodeQualityBCR(IntPtr objptr,
                                                        IntPtr pnQuality);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetCodeQualityDMR(IntPtr objptr,
                                                        IntPtr pnQuality);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetCodeQualityLast(IntPtr objptr,
                                                         IntPtr pnQuality);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetCodeTime(IntPtr objptr,
                                                         IntPtr pnTime);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncLoadRecipes(IntPtr objptr,
                                                  int nTimeType,
                                                  IntPtr pnTime);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncLoadRecipes(IntPtr objptr,
                                                  string cpFilePath,
                                                  string cpFilename);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncLoadRecipesToSlot(IntPtr objptr,
                                                        string cpFilePath,
                                                        string cpFilename,
                                                        int nSlot);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetLastError(IntPtr objptr);

        [DllImport("wid110Lib.dll")]
        public static extern int FuncGetErrorDescription(IntPtr objptr,
                                                          int nError,
                                                          StringBuilder strText,
                                                          int nTextLength);


        // ====================================================================
        /// <summary>
        /// Constructor: Initialize WID C# Library.
        /// </summary>
        // ====================================================================

        public Wid110LibV7()
        {
            dll = FCreateDll();
        }


        // ====================================================================
        /// <summary>
        /// Destructor: Remove WID C# Library.
        /// </summary>
        // ====================================================================

        ~Wid110LibV7()
        {
            FDestroyDll(dll);
        }


        // ====================================================================
        /// <summary>
        /// Create WID C# Library instance.
        /// </summary>
        /// <return> DLL if created, NULL upon error.</return>
        // ====================================================================

        private IntPtr FCreateDll()
        {
            IntPtr d = IntPtr.Zero;

            lastExcp = "";
            errno = Wid110LibConstV7.ecNone;

            try
            {
                d = FuncCreateDll();
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return d;
        }


        // ====================================================================
        /// <summary>
        /// Destroy WID C# Library instance.
        /// </summary>
        /// <param name="dll"> DLL to destroy.</param>
        /// <return>           true if destroyed.</return>
        // ====================================================================

        private bool FDestroyDll(IntPtr dll)
        {
            bool ok = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncDestroyDll(dll))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            ok = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return ok;
        }


        // ====================================================================
        /// <summary>
        /// Initialize library and connect to IP.
        /// </summary>
        /// <param name="ip"> IP to connect.</param>
        /// <return>          true if connected.</return>
        // ====================================================================

        public bool FInit(string ip)
        {
            bool isInit = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncInit(dll, ip))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            isInit = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }


            return isInit;
        }


        // ====================================================================
        /// <summary>
        /// Check library state.
        /// </summary>
        /// <return> true if initialized.</return>
        // ====================================================================

        public bool FIsInitialized()
        {
            if (dll == IntPtr.Zero)
            {
                errno = Wid110LibConstV7.ecInvObj;
                return false;
            }

            bool isInit = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncIsInitialized(dll))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            isInit = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return isInit;
        }


        // ====================================================================
        /// <summary>
        /// Terminate connection.
        /// </summary>
        /// <return> true if disconnected.</return>
        // ====================================================================

        public bool FExit()
        {
            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncExit(dll))
                {
                    case Wid110LibConstV7.rcError:
                    case Wid110LibConstV7.rcNoError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return true;	// if FuncExit() fails or not, lib is always "not init"
        }


        // ====================================================================
        /// <summary>
        /// Get library version.
        /// </summary>
        /// <param name="v"> WID110 library version.</param>
        // ====================================================================

        public string FGetVersion()
        {
            StringBuilder sb = new StringBuilder("", Wid110LibConstV7.versLenCS);

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncGetVersion(dll, sb, Wid110LibConstV7.versLenC))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            version = "";       // reset string if error occured
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            version = sb.ToString();    // copy string if lib function had no error
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return version;
        }


        // ====================================================================
        /// <summary>
        /// Get sensor interface version.
        /// </summary>
        /// <return> WID110 interface version.</return>
        // ====================================================================

        public string FGetVersionParam()
        {
            StringBuilder sb = new StringBuilder("", Wid110LibConstV7.versLenCS);

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncGetVersionParam(dll, sb, Wid110LibConstV7.versLenC))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            versParam = "";     // reset string if error occured
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            versParam = sb.ToString();  // copy string if lib function had no error
                            break;
                        }
                }
            }
            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return versParam;
        }


        // ====================================================================
        /// <summary>
        /// Change overlay flag.
        /// </summary>
        /// <param name="o"> overlay flag.</param>
        /// <return>         true if changed.</return>
        // ====================================================================

        public bool FSwitchOverlay(bool o)
        {
            bool ok = false;
            int ovl = (o) ? 1 : 0;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncSwitchOverlay(dll, ovl))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            ok = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return ok;
        }


        // ====================================================================
        /// <summary>
        /// Perform a live read using the temporary settings from an
        /// earlier 'FLiveGetImage()' call.
        /// </summary>
        /// <return> true if done.</return>
        // ====================================================================

        public bool FLiveRead()
        {
            bool ok = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncLiveRead(dll))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            ok = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return ok;
        }


        // ====================================================================
        /// <summary>
        /// Perform a live read using the given parameters, and decode.
        /// </summary>
        /// <param name="name">      name to save image to.</param>
        /// <param name="channel">   illumination channel.</param>
        /// <param name="intensity"> illumination intensity.</param>
        /// <param name="color">     illumination color.</param>
        /// <return>                 true if done.</return>
        // ====================================================================

        public bool FLiveRead(string name,
                               int channel,
                               int intensity,
                               int color)
        {
            bool ok = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncLiveGetImageRead(dll, name, channel, intensity, color))
                {
                    case Wid110LibConstV7.rcError:
                        break;

                    case Wid110LibConstV7.rcInvObj:
                        errno = Wid110LibConstV7.ecInvObj;
                        break;

                    case Wid110LibConstV7.rcNoError:
                        ok = true;
                        break;
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return ok;
        }


        // ====================================================================
        /// <summary>
        /// Perform a process read..
        /// </summary>
        /// <return> true if done.</return>
        // ====================================================================

        public bool FProcessRead()
        {
            bool ok = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncProcessRead(dll))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            ok = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return ok;
        }


        // ====================================================================
        /// <summary>
        /// Get code quality for OCR codes.
        /// </summary>
        /// <return> code quality, or rsltNoCodeQuality upon failure.</return>
        // ====================================================================

        public int FGetCodeQualityOCR()
        {
            IntPtr q = Marshal.AllocHGlobal(sizeof(int));
            int rc = Wid110LibConstV7.rsltNoCodeQuality;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncGetCodeQualityOCR(dll, q))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            rc = Marshal.ReadInt32(q);
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            Marshal.FreeHGlobal(q);

            return rc;
        }


        // ====================================================================
        /// <summary>
        /// Get code quality for BCR codes.
        /// </summary>
        /// <return> code quality, or rsltNoCodeQuality upon failure.</return>
        // ====================================================================

        public int FGetCodeQualityBCR()
        {
            IntPtr q = Marshal.AllocHGlobal(sizeof(int));
            int rc = Wid110LibConstV7.rsltNoCodeQuality;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncGetCodeQualityBCR(dll, q))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            rc = Marshal.ReadInt32(q);
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            Marshal.FreeHGlobal(q);

            return rc;
        }


        // ====================================================================
        /// <summary>
        /// Get code quality for DMR codes.
        /// </summary>
        /// <return> code quality, or rsltNoCodeQuality upon failure.</return>
        // ====================================================================

        public int FGetCodeQualityDMR()
        {
            IntPtr q = Marshal.AllocHGlobal(sizeof(int));
            int rc = Wid110LibConstV7.rsltNoCodeQuality;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncGetCodeQualityDMR(dll, q))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            rc = Marshal.ReadInt32(q);
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            Marshal.FreeHGlobal(q);

            return rc;
        }


        // ====================================================================
        /// <summary>
        /// Get code quality for LAST code.
        /// </summary>
        /// <return> code quality, or rsltNoCodeQuality upon failure.</return>
        // ====================================================================

        public int FGetCodeQualityLast()
        {
            IntPtr q = Marshal.AllocHGlobal(sizeof(int));
            int rc = Wid110LibConstV7.rsltNoCodeQuality;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncGetCodeQualityLast(dll, q))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            rc = Marshal.ReadInt32(q);
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            Marshal.FreeHGlobal(q);

            return rc;
        }


        // ====================================================================
        /// <summary>
        /// Retrieve image from last process trigger.
        /// </summary>
        /// <param name="name"> file name to save image.</param>
        /// <param name="type"> 'pvImgBest' or 'pvImgAll'.</param>
        /// <return>            true if OK.</return>
        // ====================================================================

        public bool FProcessGetImage(string name,
                                      int type)
        {
            bool ok = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncProcessGetImage(dll, name, type))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            ok = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return ok;
        }


        // ====================================================================
        /// <summary>
        /// Get the last BCR/OCR/DMR decode result.
        /// </summary>
        /// <return> the latest read result.</return>
        // ====================================================================

        public string FGetWaferId()
        {
            StringBuilder sb = new StringBuilder(Wid110LibConstV7.rsltERROR,
                                                  Wid110LibConstV7.rsltLenCS);
            string res = Wid110LibConstV7.rsltERROR;
            IntPtr pok = Marshal.AllocHGlobal(sizeof(int));

            readOK = Wid110LibConstV7.rcError;
            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncGetWaferId(dll, sb, Wid110LibConstV7.rsltLenC, pok))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            readOK = Marshal.ReadInt32(pok);

                            if (1 == readOK)
                                res = Wid110LibConstV7.rsltREAD + sb.ToString();
                            else
                                res = Wid110LibConstV7.rsltNOREAD + sb.ToString();
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            Marshal.FreeHGlobal(pok);

            return res;
        }


        // ====================================================================
        /// <summary>
        /// Take a single image using the given parameters.
        /// </summary>
        /// <param name="name">      name to save image to.</param>
        /// <param name="channel">   illumination channel.</param>
        /// <param name="intensity"> illumination intensity.</param>
        /// <param name="color">     illumination color.</param>
        /// <return>                 true if OK.</return>
        // ====================================================================

        public bool FLiveGetImage(string name,
                                   int channel,
                                   int intensity,
                                   int color)
        {
            bool ok = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncLiveGetImage(dll, name, channel, intensity, color))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            ok = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return ok;
        }



        // ====================================================================
        /// <summary>
        /// Load process parameter file
        /// </summary>
        /// <param name="path"> path to file.</param>
        /// <param name="file"> file to use.</param>
        /// <return>            true if OK.</return>
        // ====================================================================

        public bool FLoadRecipes(string path,
                                  string file)
        {
            bool ok = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncLoadRecipes(dll, path, file))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            ok = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return ok;
        }



        // ====================================================================
        /// <summary>
        /// Load parameters to a certain parameter slot (if applicable)
        /// </summary>
        /// <param name="path"> path to file.</param>
        /// <param name="file"> file to use.</param>
        /// <param name="slot"> slot (only for ocf and led files).</param>
        /// <return>            true if valid.</return>
        // ====================================================================

        public bool FLoadRecipesToSlot(string path,
                                        string file,
                                        int slot)
        {
            bool ok = false;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";
            string sPath = path;
            if (false == sPath.EndsWith("\\"))
            {
                sPath += ("\\");
            }

            try
            {
                switch (FuncLoadRecipesToSlot(dll, sPath, file, slot))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            ok = true;
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return ok;
        }


        // ====================================================================
        /// <summary>
        /// Get code time parameter
        /// </summary>
        /// <return> overall process time or rsltNoCodeTime upon failure.</return>
        // ====================================================================

        public int FGetCodeTime()
        {
            IntPtr q = Marshal.AllocHGlobal(sizeof(int));
            int rc = Wid110LibConstV7.rsltNoCodeTime;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try
            {
                switch (FuncGetCodeTime(dll, q))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            rc = Marshal.ReadInt32(q);
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            Marshal.FreeHGlobal(q);

            return rc;
        }


        // ====================================================================
        /// <summary>
        /// Get error description.
        /// </summary>
        /// <param name="eno"> error number to translate.</param>
        /// <return> error description.</return>
        // ====================================================================

        public string FGetErrorDescription(int eno)
        {
            StringBuilder sb = new StringBuilder(Wid110LibConstV7.errDESC,
                                                  Wid110LibConstV7.errLen);
            string text = Wid110LibConstV7.errDESC;
            int len = Wid110LibConstV7.errLen;

            errno = Wid110LibConstV7.ecNone;
            lastExcp = "";

            try		// if lib handle is invalid, error text is generated as well
            {
                switch (FuncGetErrorDescription(dll, eno, sb, len))
                {
                    case Wid110LibConstV7.rcError:
                        {
                            break;
                        }
                    case Wid110LibConstV7.rcInvObj:
                        {
                            errno = Wid110LibConstV7.ecInvObj;
                            break;
                        }
                    case Wid110LibConstV7.rcNoError:
                        {
                            text = sb.ToString();
                            break;
                        }
                }
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return text;
        }



        // ====================================================================
        /// <summary>
        /// Get last error number.
        /// </summary>
        /// <return> last error number.</return>
        // ====================================================================

        public int FGetLastError()
        {
            if (Wid110LibConstV7.ecInvObj == errno)	// if lib handle was invalid in last call
            {						// it is probably still invalid, so
                return errno;				// FuncGetLastError() will fail as well
            }

            lastExcp = "";

            try
            {
                errno = FuncGetLastError(dll);		// get last internal lib error
            }

            catch (Exception e)
            {
                lastExcp = e.ToString();
            }

            return errno;
        }



        // ====================================================================
        /// <summary>
        /// Get the last error number.
        /// </summary>
        /// <return> last error number.</return>
        // ====================================================================

        public int getErrno()
        {
            return errno;
        }


        // ====================================================================
        /// <summary>
        /// Get the result read state.
        /// </summary>
        /// <return> result read state.</return>
        // ====================================================================

        public int getReadOK()
        {
            return readOK;
        }


        // ====================================================================
        /// <summary>
        /// Get the last exception message.
        /// </summary>
        /// <return> last exception message.</return>
        // ====================================================================

        public string getLastExcp()
        {
            return lastExcp;
        }


        // ====================================================================
        /// <summary>
        /// Get temporary image name.
        /// </summary>
        /// <return> temporary image name.</return>
        // ====================================================================

        public string getTmpImage()
        {
            return tmpImage;
        }


        // ====================================================================
        /// <summary>
        /// Get exception state.
        /// </summary>
        /// <return> true if exception.</return>
        // ====================================================================

        public bool isException()
        {
            return lastExcp.Length != 0;
        }

    }
}