IntPtr HWND_BROADCAST = new IntPtr(0xffff);
IntPtr HWND_TOP = new IntPtr(0);
IntPtr HWND_BOTTOM = new IntPtr(1);
IntPtr HWND_TOPMOST = new IntPtr(-1);
IntPtr HWND_NOTOPMOST = new IntPtr(-2);
IntPtr HWND_MESSAGE = new IntPtr(-3);
TODO
Used in SendMessage api