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Frequently Asked Questions

Performing undo on an edit control.

Question:

How can I programmatically undo changes in an edit type control?

Answer:

You can use:



Memo1.Perform(EM_UNDO, 0, 0);



If you want to check whether undo is available, so you can 

enable or disable a menu item choice, you can check the 

"Undo status" like this:



If Memo1.Perform(EM_CANUNDO, 0, 0) <> 0 then begin

  {Undo is possible}

end;



To preform a "Redo" simply "Undo" a second time.

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