private static void HandleMouseButtonUp(NMouseButton mouseButton, Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
int x = (short)(lParam & 0xFFFF);
int y = (short)((lParam >> 16) & 0xFFFF);
if (!AnyMouseButtonIsDown())
{
Win32API.ReleaseCapture();
}
window.StartupInfo.OnMouseButtonUp(mouseButton, new Point(x, y));
}