/// <summary>
/// Remove the corners of a window by replacing the background of these corners by transparency.
/// </summary>
/// <param name="handle"></param>
/// <param name="windowImage"></param>
/// <param name="redBGImage"></param>
/// <param name="windowRect"></param>
/// <returns></returns>
private static Image RemoveCorners(IntPtr handle, Image windowImage, Bitmap redBGImage, Rectangle windowRect)
{
const int cornerSize = 5;
if (windowRect.Width > cornerSize * 2 && windowRect.Height > cornerSize * 2)
{
FileSystem.AppendDebug("Clean transparent corners");
if (redBGImage == null)
{
using (Form form = new Form())
{
form.FormBorderStyle = FormBorderStyle.None;
form.ShowInTaskbar = false;
form.BackColor = Color.Red;
NativeMethods.ShowWindow(form.Handle, (int)NativeMethods.WindowShowStyle.ShowNormalNoActivate);
NativeMethods.SetWindowPos(form.Handle, handle, windowRect.X, windowRect.Y, windowRect.Width, windowRect.Height, NativeMethods.SWP_NOACTIVATE);
Application.DoEvents();
redBGImage = CaptureRectangle(windowRect) as Bitmap;
}
}
return(GraphicsMgr.RemoveCorners(windowImage, redBGImage));
}
return(null);
}
