Scrolling Window on Modal Dialog

I basically need to display and maipulate a scrolled image on a dialog. One problem seems to be that you cannot create a CScrollView (or any view for that matter) on a dialog -- an internal assertion fails when the view's parent frame is not the application frame. So I tried to work around this by placing a "picture" item on the dialog, setting its property to "frame", grabbing a CWnd handle to it in OnInitialUpdate(), and displaying / enabling the scroll bars. The scroll bars show up but they don't do anything. I can't move them with the mouse. Ideas?