public static extern bool XIQueryPointer(IntPtr display,
TInt deviceid, IntPtr win,
out IntPtr root_return, out IntPtr child_return,
out double root_x_return, out double root_y_return,
out double win_x_return, out double win_y_return,
out XIButtonState buttons_return, out XIModifierState modifiers_return,
out XIGroupState group_return);
public static extern Bool QueryPointer(Display display,
int deviceid, Window win,
out Window root_return, out Window child_return,
out double root_x_return, out double root_y_return,
out double win_x_return, out double win_y_return,
out XIButtonState buttons_return, out XIModifierState modifiers_return,
out XIGroupState group_return);