internal override bool SetVisible (IntPtr handle, bool visible, bool activate)
		{
			Hwnd	hwnd;

			hwnd = Hwnd.ObjectFromHandle(handle);
			hwnd.visible = visible;

			lock (XlibLock) {
				if (visible) {
					MapWindow(hwnd, WindowType.Both);

					if (Control.FromHandle(handle) is Form) {
						FormWindowState	s;

						s = ((Form)Control.FromHandle(handle)).WindowState;

						switch(s) {
							case FormWindowState.Minimized:	SetWindowState(handle, FormWindowState.Minimized); break;
							case FormWindowState.Maximized:	SetWindowState(handle, FormWindowState.Maximized); break;
						}

#if SYNTHETIC_ACTIVATE_ON_SHOW
						// this is pretty evil, but we need it so that we match
						// MS's behavior in terms of Form.Show() -> WM_ACTIVATE
						// synchronously.
						if (hwnd.need_initial_activate) {
							hwnd.need_initial_activate = false;
							hwnd.ignore_activate = true;

							if (ActiveWindow != IntPtr.Zero) {
								Hwnd active_hwnd = hwnd = Hwnd.ObjectFromHandle (ActiveWindow);
								Console.WriteLine ("Deactivating window {0}", ActiveWindow);
								Console.WriteLine (Environment.StackTrace);
								SendMessage (ActiveWindow, Msg.WM_ACTIVATE, (IntPtr) WindowActiveFlags.WA_INACTIVE, IntPtr.Zero);
							}
							ActiveWindow = handle;
							Console.WriteLine ("Activating window {0}", ActiveWindow);
							Console.WriteLine (Environment.StackTrace);
							SendMessage (ActiveWindow, Msg.WM_ACTIVATE, (IntPtr) WindowActiveFlags.WA_ACTIVE, IntPtr.Zero);

							/* make sure we update the property here, just to be sure */
							SendNetWMMessage(ActiveWindow.whole_window, _NET_ACTIVE_WINDOW, (IntPtr)1, IntPtr.Zero, IntPtr.Zero);
						}
#endif
					}

					SendMessage(handle, Msg.WM_WINDOWPOSCHANGED, IntPtr.Zero, IntPtr.Zero);
				}
				else {
					UnmapWindow(hwnd, WindowType.Both);
				}
			}
			return true;
		}