[CLOSED] Howto show a windows from a class

[tMp]

Hello

I am struggling with the simple task to show a window from a class file. If I show it from main aspx.cs from a direct method I normally do it like this:

Window win = new Window();
win.Render(this.Form);

but from a class file "this.Form" is not working. What is the best way to do it from a class file? Using "getcmp" or ...?

Thank you very much for any tip in the right direction.

best regards