Hey ! How microsoft execute save state of program to "CTR + Z"

HoW can microsoft safe state of programe every it changes to undo again.
:confused:

Hey,

I am not sure that I fully understand what you are asking. Can you elaborate?

At a guess, is this what you are after:

http://undo.codeplex.com/

Gary

If you mean how to put Shortcut Ctrl+Z to work in your program then in Visual Studio Designer select menu item and in properties under Shortcutkeys put CTRL+Z. Thats it.

If you need a undo/redo possibility in your program thats a litlle bit complicating but to start with something read about Stack here and search it on Google...