As I understand it, the PowerBASIC tool creates the layout of a window in (BASIC) code.
A tool that creates a dialog template would be slightly more useful, but IMO creating the window layout isn't hard -- the real problem is the logic behind the window. A tool that creates VB-like event handlers for C might be slightly more useful, but would only take you a few more steps toward a finished program. Implementing such a tool, that is flexible enough, is surely more work than it's worth...