Re: SubClassing error
"Daniel Kaplan" <NoSPam@NoSpam.com> wrote in message
news:1174267483.285382@nntp.acecape.com...
Am trying to subclass a window of antoher app, and I keep getting an error
5 (Access denied). Forgot what I have to do in Win32, been a while.
Isn't there something I have to do like attach the thread, or seomthing
like that.
To subclass a window in another application, you need change to find a way
to get your code to run in another application. Since processes don't share
their addresses spaces in Win32 that his problematic.
One common method involves planting a global hook first. Then Windows'
loader will do the heavy lifting and insinuate your code into the other
application when the hook is triggered. Once your hook procedure runs it can
change the window procedure by calling SetWindowLong(GWL_WNDPROC, ...)
Another option is to search the net for Jeffrey Richter's "inject library"
utility. A third option is to use CreateRemoteThread() which is harder than
it appears at first blush.
Regards,
Will
www.ivrforbeginners.com