Kepler-Release/Venus/Venus_Themes/Styles/CustomWindowStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:ui="clr-namespace:Venus_Themes.CustomControls"
                    xmlns:local="Venus_Themes.Style">
    <Style TargetType="{x:Type Window}" x:Key="ShellWindow">
        <Setter Property="Background" Value="White"></Setter>
        <Setter Property="WindowStyle" Value="None"></Setter>
        <Setter Property="AllowsTransparency" Value="False"></Setter>
        <Setter Property="Template" >
            <Setter.Value>
                <ControlTemplate TargetType="Window">
                    <Border BorderBrush="#333" BorderThickness="1" Background="#eee">
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="25"></RowDefinition>
                                <RowDefinition Height="*"></RowDefinition>
                            </Grid.RowDefinitions>
                            <ui:WindowTopArea Background="White">
                                <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
                                    <StackPanel Orientation="Horizontal" Margin="5" HorizontalAlignment="Left" VerticalAlignment="Center">
                                        <Path Data="{StaticResource Icon_Auto}" Stretch="Fill" Stroke="Gray" Width="12" Height="12"></Path>
                                        <TextBlock Text="{TemplateBinding Title}" Foreground="Gray" Margin="5 2" HorizontalAlignment="Center" VerticalAlignment="Center" FontFamily="12"></TextBlock>
                                    </StackPanel>
                                    <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,0,10,0">

                                        <ui:WindowButtonMin Background="Transparent" BorderThickness="0" Cursor="Hand">
                                            <TextBlock Text="➖" Foreground="Silver"  Width="16" Height="16" />
                                        </ui:WindowButtonMin>
                                        <!--<ui:WindowButtonClose>
                                            <TextBlock Text="✖" Foreground="Silver"  Width="16" Height="16"/>
                                        </ui:WindowButtonClose>-->

                                    </StackPanel>
                                </Grid>
                            </ui:WindowTopArea>
                            <AdornerDecorator Grid.Row="1">
                                <ContentPresenter></ContentPresenter>
                            </AdornerDecorator>
                        </Grid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>