>Hi,
>I´m trying to add a form to a class based on Custom.
>But when I do a "DO FORM" instruction, it gives me this error:
>"User interface instruction not alowed in this moment"
>
>So,
>Is it possible to add a form to a class based on Custom?
>If yes, what am I doing wrong?
>
>Thanks,
>Ibai

Not if you build it as a DLL. You can build your COM server as an out of process EXE to be able to add user interface elements.