Condition if variable different than x or y

Hello !

Today I have a simple question.

I have a cell that I want to contain "C" or "NC". When I press my button control, I want a MsgBox to pop up if it's different.
I tried this :

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Of course, it doesn't work, or else I wouldn't be there

Is there a way to do it like so, or do I have to write strContent <> "C" and strContent <> "NC" ?

Thank you !

Hi.
try this:

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Or a change event

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@mancubus : Yeah, using "with" could save me some space, thanks.
@Vraag en antwoord : I don't think I need the change event. Plus, if I write If Target <> "C" Or Target <> "NC" It will always be true, since the value can't be "C" and "NC" at the same time. Schrödinger would disagree with me, though

oops must be And

With a change event you don't need a button.

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I figured that ahah

Yes I know how it works, but the check has to be done just before the validation so I tell you I don't need it :P But thank you anyway !