/// <summary>
/// Get the region for a window
/// </summary>
/// <param name="interopWindow">InteropWindow</param>
public static Region GetRegion(this IInteropWindow interopWindow)
{
using (var region = Gdi32Api.CreateRectRgn(0, 0, 0, 0))
{
if (region.IsInvalid)
{
return(null);
}
var result = User32Api.GetWindowRgn(interopWindow.Handle, region);
if (result != RegionResults.Error && result != RegionResults.NullRegion)
{
return(Region.FromHrgn(region.DangerousGetHandle()));
}
}
return(null);
}
/// <summary>
/// Directly call Gdi32.CreateRectRgn
/// </summary>
/// <param name="left"></param>
/// <param name="top"></param>
/// <param name="right"></param>
/// <param name="bottom"></param>
/// <returns>SafeRegionHandle</returns>
public static SafeRegionHandle CreateRectRgn(int left, int top, int right, int bottom)
{
return(Gdi32Api.CreateRectRgn(left, top, right, bottom));
}
