Restore the value of Bound controls

[IIBRAHIM]

I have a form with several controls.



Now, I want a situation where if a user changes or deletes the contents of any of the controls, it should undo it and restore the previous value. I have tried all i could but still does not work.

If I use Me.Undo, it works but restores the values of all the controls (which I do not want to do).

I am using this to try do that (for 1 of the controls):
Me!txtsysinput.Undo

However, this also does not work.

If there something further i need to do for the controls event anywhere?

Please assist. This is urgent.

[CJ_London]

you can try

txtsysinput=txtsysinput.oldvalue

but if you don't want users to edit values, lock and/or disable the control