RS>
  >           Could it be that the window word is really a
  > static varable with a hidden pointer passed to each function
  > much lke the hidden pointer 'this' in C++?
RS>

  If you consider that HWND is a "magic cookie", and that somewhere in
  the bowels of Presentation Manager there is a structure that
  represents a window on screen, recording its position and whatnot,
  then window words can simply be considered to be elements of this
  internal structure that are available for application use.

  Window words are not in themselves variables that you can somehow
  access from C or C++.  As far as you are concerned, windows are "black
  boxes", and the only thing that you know about them is their HWND.
  Window words are data that you, the application writer, can put into
  and retrieve back out of a window, knowing only its HWND.

  > JdeBP <
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