private static bool IsClassRegistered()
{
// Get instance handle
IntPtr instance = Marshal.GetHINSTANCE(typeof(MessageWindow).Module);
// Set class name
string class_name = "WSUtilWindow";
// Set up struct
User.WNDCLASSEX window_class = new User.WNDCLASSEX { cbSize = (uint)Marshal.SizeOf(typeof(User.WNDCLASSEX)) };
// Return if class exists
return User.GetClassInfoEx(instance,class_name,ref window_class);
}
private static void RegisterClass()
{
// Set up struct
User.WNDCLASSEX window_class = new User.WNDCLASSEX();
window_class.cbSize = (uint)Marshal.SizeOf(typeof(User.WNDCLASSEX));
window_class.style = User.ClassStyles.None;
window_class.lpfnWndProc = new User.WindowProc(User.DefWindowProc);
window_class.cbClsExtra = 0;
window_class.cbWndExtra = 0;
window_class.hInstance = Marshal.GetHINSTANCE(typeof(MessageWindow).Module);
window_class.hIcon = IntPtr.Zero;
window_class.hIconSm = IntPtr.Zero;
window_class.lpszMenuName = String.Empty;
window_class.lpszClassName = "WSUtilWindow";
// Register class
if (User.RegisterClassEx(ref window_class) == 0) throw new Exception("Could not register class.");
}