private const string _IID_IDispatchEx = "{a6ef9860-c720-11d0-9337-00a0c90dcaa9}";

    case _IID_IDispatchEx:

      case _IID_IDispatchEx:

Guid IID_IDispatchEx = new Guid("{a6ef9860-c720-11d0-9337-00a0c90dcaa9}");