internal override bool Text(IntPtr handle, string text) {
Hwnd hwnd = Hwnd.ObjectFromHandle (handle);
if (WindowMapping [hwnd.Handle] != null) {
SetWindowTitleWithCFString ((IntPtr)(WindowMapping [hwnd.Handle]), __CFStringMakeConstantString (text));
}
SetControlTitleWithCFString (hwnd.whole_window, __CFStringMakeConstantString (text));
SetControlTitleWithCFString (hwnd.client_window, __CFStringMakeConstantString (text));
return true;
}