Re: Capture windows area

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From: Peter Gast (peter.gast_at_tiscali.de)
Date: 01/03/05 

Date: Mon, 3 Jan 2005 14:39:27 +0100

Thanks Mike for this simple and effective idea
Peter

"Mike D Sutton" <EDais@mvps.org> schrieb im Newsbeitrag
news:%23zpFTNY8EHA.2156@TK2MSFTNGP10.phx.gbl...
> > I want for a small graph-app. a feature which enables capturing a
visible
> > area of the desktop. The code works almost fine when I move a rectangle
with
> > the mouse the area inside this rectangle is captured. The problem is,
that
> > in some cases some object get the focus and change their colors (for ex.
if
> > you make a rectangle were an icon of the desktop is inside, or inside
the IE
> > pictures can get focused and changes). How can I avoid that this occurs?
> > How can I draw visible rectangle to give the user a feedback of the
current
> > area?
>
> 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:
>
http://groups.google.co.uk/groups?selm=Oj5dEKMFDHA.2824%40TK2MSFTNGP11.phx.gbl
> 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,
>
> Mike
>
>
> - Microsoft Visual Basic MVP -
> E-Mail: EDais@mvps.org
> WWW: http://EDais.mvps.org/
>
>

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