does any one knows how to implement a Undo/Redo drop-down list like the one
in WORD.

yoram.

Stingray Objective Toolkit has a two-part toolbar button that is similar.
You basically get separate command notifications for the down arrow and the
main button part. You can then show whatever UI you want in response to the
command. Requires use of our toolbar class.

http://www.stingray.com

Brad