CyberX8/CyberX8_Themes/Styles/WindowElementStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:controls="clr-namespace:CyberX8_Themes.CustomControls"
                    xmlns:local="CyberX8_Themes.Style">
    <Style TargetType="{x:Type controls:WindowButtonBase}">
        <Setter Property="Margin" Value="0 0 1 0"></Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type controls:WindowButtonBase}">
                    <Border  x:Name="bg" Background="Transparent" Width="25" Height="25">
                        <ContentPresenter x:Name="content" HorizontalAlignment="Center" VerticalAlignment="Center"  Opacity="1"></ContentPresenter>
                    </Border>
                    <!--<ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter Property="Background" Value="#333" TargetName="bg"></Setter>
                            <Setter Property="Opacity" Value="1" TargetName="content"></Setter>
                        </Trigger>
                    </ControlTemplate.Triggers>-->
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style TargetType="{x:Type controls:WindowButtonClose}">
        <Setter Property="Margin" Value="0 0 1 0"></Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type controls:WindowButtonClose}">
                    <Border  x:Name="bg" Background="Transparent" Width="25" Height="25">
                        <ContentPresenter x:Name="content" HorizontalAlignment="Center" VerticalAlignment="Center"  Opacity="0.5" RenderTransformOrigin="0.5 0.5">
                            <ContentPresenter.RenderTransform>
                                <RotateTransform x:Name="angleRotateTransform" ></RotateTransform>
                            </ContentPresenter.RenderTransform>
                        </ContentPresenter>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter Property="Background" Value="Red" TargetName="bg"></Setter>
                            <Setter Property="Opacity" Value="1" TargetName="content"></Setter>
                            <Trigger.EnterActions>
                                <BeginStoryboard>
                                    <Storyboard>
                                        <DoubleAnimation Storyboard.TargetName="angleRotateTransform" Storyboard.TargetProperty="Angle"
                                                         From="0" To="90" Duration="0:0:0.5">
                                            <DoubleAnimation.EasingFunction>
                                                <BackEase EasingMode="EaseInOut"></BackEase>
                                            </DoubleAnimation.EasingFunction>
                                        </DoubleAnimation>
                                    </Storyboard>
                                </BeginStoryboard>
                            </Trigger.EnterActions>
                            <Trigger.ExitActions>
                                <BeginStoryboard>
                                    <Storyboard>
                                        <DoubleAnimation Storyboard.TargetName="angleRotateTransform" Storyboard.TargetProperty="Angle"
                                                         From="90" To="0" Duration="0:0:0.5">
                                            <DoubleAnimation.EasingFunction>
                                                <BackEase EasingMode="EaseInOut"></BackEase>
                                            </DoubleAnimation.EasingFunction>
                                        </DoubleAnimation>
                                    </Storyboard>
                                </BeginStoryboard>
                            </Trigger.ExitActions>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>