Undo button - last activity

Asked Sep 07 '15 at 09:29

Active Sep 07 '15 at 10:15

Viewed 68 times

I wanted to write my own code for the "Undo" button, and I am looking for some information about some event that may be fundamental for it. I mean that I need to know when exactly store internal information. Event "TextChanged" for the RichTextBox is not good, I would like to store it when some action is performed, like when one does change the text to bold, or uploads the photo, etc. Is there any event that could be useful for me in that case? Cause I can't find one.

I am using Windows Forms.

EDIT: @demo: The subject you linked to gives an idea how "undo" works. I already know it, what I need is to how to determine that the RichTextBox state has changed.

edited Sep 07 '15 at 10:15

asked Sep 07 '15 at 09:29

Paweł Poręba

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possible duplicate of [How to implement 'undo' operation in .net windows application?](http://stackoverflow.com/questions/800940/how-to-implement-undo-operation-in-net-windows-application) – demo Sep 07 '15 at 09:37
Please read my update. – Paweł Poręba Sep 07 '15 at 10:16
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You do realize that `RichTextBox` has the `Undo` method, right? What's wrong with that? – Luaan Sep 07 '15 at 11:00
It's perfectly right, I just want to make my own that would work similarly and need some help. – Paweł Poręba Sep 07 '15 at 11:38

Undo button - last activity

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