Call one form from another

Has anyone developed a plugin that has a main form and displays another form?

I’m at a loss. I can do it when neither form is part of a plugin, but not when they are inside a plugin framework.

So how is the “other” form displayed? Do you poke a button?

I have to confess I completely forgot about this thread. I’m not sure what my problem was, since I’ve been doing just what I said I couldn’t do for some time, now.

Sorry for the bother.