//cf. http://stackoverflow.com/a/1020819/1569
internal static Bitmap GetCursor()
{
Windowing.CURSORINFO cursorInfo = new Windowing.CURSORINFO();
cursorInfo.cbSize = Marshal.SizeOf(cursorInfo);
if (!Windowing.GetCursorInfo(out cursorInfo))
{
return(null);
}
if (cursorInfo.flags != Windowing.CURSOR_SHOWING)
{
return(null);
}
IntPtr hicon = Windowing.CopyIcon(cursorInfo.hCursor);
if (hicon == IntPtr.Zero)
{
return(null);
}
Windowing.ICONINFO iconInfo;
if (!Windowing.GetIconInfo(hicon, out iconInfo))
{
return(null);
}
int x = cursorInfo.ptScreenPos.X - ((int)iconInfo.xHotspot);
int y = cursorInfo.ptScreenPos.Y - ((int)iconInfo.yHotspot);
using (Bitmap maskBitmap = Bitmap.FromHbitmap(iconInfo.hbmMask))
{
// Is this a monochrome cursor?
if (maskBitmap.Height == maskBitmap.Width * 2)
{
Bitmap resultBitmap = new Bitmap(maskBitmap.Width, maskBitmap.Width);
Graphics desktopGraphics = Graphics.FromHwnd(Windowing.GetDesktopWindow());
IntPtr desktopHdc = desktopGraphics.GetHdc();
IntPtr maskHdc = Windowing.CreateCompatibleDC(desktopHdc);
IntPtr oldPtr = Windowing.SelectObject(maskHdc, maskBitmap.GetHbitmap());
using (Graphics resultGraphics = Graphics.FromImage(resultBitmap))
{
IntPtr resultHdc = resultGraphics.GetHdc();
// These two operation will result in a black cursor over a white background.
// Later in the code, a call to MakeTransparent() will get rid of the white background.
Windowing.BitBlt(resultHdc, 0, 0, 32, 32, maskHdc, 0, 32, Windowing.TernaryRasterOperations.SRCCOPY);
Windowing.BitBlt(resultHdc, 0, 0, 32, 32, maskHdc, 0, 0, Windowing.TernaryRasterOperations.SRCINVERT);
resultGraphics.ReleaseHdc(resultHdc);
}
IntPtr newPtr = Windowing.SelectObject(maskHdc, oldPtr);
Windowing.DeleteDC(newPtr);
Windowing.DeleteDC(maskHdc);
desktopGraphics.ReleaseHdc(desktopHdc);
// Remove the white background from the BitBlt calls,
// resulting in a black cursor over a transparent background.
resultBitmap.MakeTransparent(Color.White);
return(resultBitmap);
}
}
Icon icon = Icon.FromHandle(hicon);
return(icon.ToBitmap());
}
