I’m unable to parse your sentence: do you want camera controls to be active while the mouse button is still held, or do you want them to be suppressed?
In either case, you can get the exact behavior you need by writing your camera controls to examine the mouse position information directly from the window, instead of getting it from the MouseWatcher. The mouse information reported by the MouseWatcher is filtered by DirectGui. If you don’t want this, go to the source. You can still use DirectGui.
David