public static void ExtendGlass(Window win, int left, int right, int top, int bottom)
{
// Obtain the window handle for WPF application
WindowInteropHelper windowInterop = new WindowInteropHelper(win);
IntPtr windowHandle = windowInterop.Handle;
HwndSource mainWindowSrc = HwndSource.FromHwnd(windowHandle);
mainWindowSrc.CompositionTarget.BackgroundColor = Colors.Transparent;
VistaGlassHelper.Margins margins =
VistaGlassHelper.GetDpiAdjustedMargins(windowHandle, left, right, top, bottom);
int returnVal = VistaGlassHelper.DwmExtendFrameIntoClientArea(mainWindowSrc.Handle, ref margins);
if (returnVal < 0)
{
throw new NotSupportedException("Operation failed.");
}
}
public static Margins GetDpiAdjustedMargins(IntPtr windowHandle, int left, int right, int top, int bottom)
{
// Get System Dpi
System.Drawing.Graphics desktop = System.Drawing.Graphics.FromHwnd(windowHandle);
float DesktopDpiX = desktop.DpiX;
float DesktopDpiY = desktop.DpiY;
// Set Margins
VistaGlassHelper.Margins margins = new VistaGlassHelper.Margins();
// Note that the default desktop Dpi is 96dpi. The margins are
// adjusted for the system Dpi.
margins.cxLeftWidth = Convert.ToInt32(left * (DesktopDpiX / 96));
margins.cxRightWidth = Convert.ToInt32(right * (DesktopDpiX / 96));
margins.cyTopHeight = Convert.ToInt32(top * (DesktopDpiX / 96));
margins.cyBottomHeight = Convert.ToInt32(right * (DesktopDpiX / 96));
return(margins);
}