mfc, docked toolbar moves when resizing window slowly

I make a simple MFC SDI app with a docking toolbar and run it. No extras,
completely standard.
When I resize the window smaller, using the mouse dragging anywhere on the
right hand edge, to the point where the right window edge meets the right
edge of the toolbar and the slowly reverse the drag in the other direction
so that the winodw is expanding it somehow catches the toolbar and drags
this along with the the resize. It's as if you were dragging the toolbar by
clicking on it but it's not clicked on.

How do I prevent this unwanted behaviour?

Thanks,
Johnny

wrote about a week ago:
by

OK 'fess up.... someone knows the answer to this...more deafening silence...
My copy of VS6 has docking toolbars and it doesn't do this but very basic
apps made using the app wiz do.
What's the deal? Anyone...