Re: using CClientDC::BitBlt() to capture only the client window

I can't give you much detail unless you tell us what your application is
supposed to do.

There are generally 2 types of paint programs, ones that simply draw, like
microsoft paint, and others where the user can add objects on the screen and
later change the object independently of other things on the image, drawing
programs like freehand.
Depending on which type you have the approach is bit different.

In the first case where you don't want to keep track of the objects, you
would simply keep a bitmap and a memory dc in your view class, and as you
detect mouse movement that would manipulate the image you make the changes
to the memory dc with the bitmap selected in it.
And in the OnPaint method of your view, you would simply bitblt the content
of the memorydc on the window dc.

In the second case your application would simply keep track of the things
that the user has done on the screen, with a list of objects that represent
the things that have been done. And in the OnPaint of the view you would
iterate the list of actions and draw them on the screen (double buffering of
course).

AliR.

"nexolite" <nexolite@discussions.microsoft.com> wrote in message
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