I need to write a procedure which capture any active window screen and
not just a form.
Recently , I have a procedure which causes a copy of every
mouse and keyboard event to be sent to the specified callback routine
regardless of what application has focus. Now I need to capture this
active window screen whenever there is refreshing of the active window
caused by a mouse click or keyboard input entered , how can I do it ?
Alternatively , I can capture the active window screen after refreshing
of the active window and how to achieve this?  

I ran across some source code amoungst a tutorial on this site:
http://www.angelfire.com/tx3/ceeser/saver.html
which was originally intended to display how to program a screensaveer, but
just as well has a small source code of how to make a screen shot of the
current screen.
 *keep it real*
      -Brian