Using a VB dll that opens its own window

[xsyguy]

I have a VB dll that I am using in my PB application with a single method for opening a window to view data from a third party application. There is a parameter I can pass to the dll to have it open the window as a modal (Response) or non-modal (Main) window. Everything works fine when I open the window as a modal window, but I get an "external function call" error when I try to open the window as a non-modal window.

I assume there is some kind of conflict happening between VB and PB in the second case, but I have no clue as to what it might be. Has anyone else had a similar problem and, if so, what was your solution?

Thanks in advance,
xsyguy