System.Windows.Forms.XplatUIX11.GrabWindow C# (CSharp) Method

		internal override void GrabWindow(IntPtr handle, IntPtr confine_to_handle) {
			Hwnd	hwnd;
			IntPtr	confine_to_window;

			confine_to_window = IntPtr.Zero;

			if (confine_to_handle != IntPtr.Zero) {
				XWindowAttributes	attributes = new XWindowAttributes();

				hwnd = Hwnd.ObjectFromHandle(confine_to_handle);

				lock (XlibLock) {
					XGetWindowAttributes(DisplayHandle, hwnd.client_window, ref attributes);
				}
				Grab.Area.X = attributes.x;
				Grab.Area.Y = attributes.y;
				Grab.Area.Width = attributes.width;
				Grab.Area.Height = attributes.height;
				Grab.Confined = true;
				confine_to_window = hwnd.client_window;
			}

			Grab.Hwnd = handle;

			hwnd = Hwnd.ObjectFromHandle(handle);

			lock (XlibLock) {
				XGrabPointer(DisplayHandle, hwnd.client_window, false, 
					EventMask.ButtonPressMask | EventMask.ButtonMotionMask |
					EventMask.ButtonReleaseMask | EventMask.PointerMotionMask | 
					EventMask.PointerMotionHintMask | EventMask.LeaveWindowMask,
					GrabMode.GrabModeAsync, GrabMode.GrabModeAsync, confine_to_window, IntPtr.Zero, IntPtr.Zero);
			}
		}