> I want for a small graph-app. a feature which enables capturing a visible
A common technique is to make a screen capture of the entire desktop and display it on a full-screen borderless form, this way the
user still sees what the desktop contains but effectively has a 'freeze-frame' while they're making their selection (which of course
won't change when the mouse hovers over it.) Once the selection has been made then hide the full-screen window and resume capture
of the desktop area as you would.
If you want to stop the user from moving the mouse over the active area during the capture then you'd probably need to 'clip' the
mouse cursor as in this post:
You may want to add an automatic unlock on a timeout though in case your window lost focus and the user didn't know about Alt+Tab to
switch it back.
Hope this helps,
- Microsoft Visual Basic MVP -