Hmmm...innnnnnteresting... It isn't only -movement- that runs up the GDI handle count. A simple click on the left mouse button does it as well, and not with a consistent value; it ranged from 1 to 5 handles added. Either something is racking up handles, or it's picking up the switch bounces that the mouseware software buffer from the OS. And that -is- clearly a VuePro issue. I ran the GDI count up to around 1500, closed the task manager, and got the redraw window mess. But a switch to 4 view and back cleared it. And no offense taken; but the hard truth is that I do not have the source code, and can do nothing about any bugs in Vue or VuePro. E-on has to do that. All I can do is suggest courses of approach involving those things the user actually has access to. At worst this eliminates possible outside causes, and may highlight the possible problem(s). Ignoring the people who have trouble is another option (since I can't 'fix' things), but that doesn't really solve anything. And the last thing needed is inaccurate bug reports; that could really cause trouble for all concerned... Besides, if this was in a business context, -I- would be doing all of that, not telling the user 'do this, this, this, and try that while you're at it'. ;P