Can I work with a derived class from u0093ApplicationClassu0094

Hello, I want to create a derived class from ApplicationClass for use in my Application, the problem is the function SAPbouiCOM.SboGuiApi.GetApplication(-1), it return a COM object. If I do a specific cast to my own class (that derive from ApplicationClass), the metod give a COM exception and say that I cant do a specific cast with a COM object.
Can I do that cast? And How can I do it?
Im programming in C#.
Thanks.

I think that you can´t assign an object of the base class
to an object of the derived class. I don´t know why you need to do that. With more information we could help you

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