WPF透明窗体制作

窗体的样式：

        <Grid Width="{Binding Width, ElementName=w}" Height="{Binding Height, ElementName=w}">
            <Border CornerRadius="5" Margin="10" BorderThickness="2" BorderBrush="White" Opacity="0.8">
                <Border.Effect>
                    <DropShadowEffect ShadowDepth="0" Color="#FF414141" BlurRadius="8"/>
                </Border.Effect>
                <Border Background="Black" Opacity="0.5" Margin="0" CornerRadius="5"/>
            </Border>
            <Grid>
                <ContentPresenter/>
            </Grid>
        </Grid>

转载：http://blog.csdn.net/cmis7645/article/details/7781990#