Closing VBA - condition: number of open workbooks

Dear Excellers,

I'm creating a code that I'd like to bind to a button.
I'd like the code to exit Excel completely if there aren't any other workbooks open.
Should there be more workbooks open, then it should just close the workbook inwhich the code is placed.

Current thoughts on the code:

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So could you either help me out by providing the code that counts the number of open workbooks or hand me a new code with a different view on things.

Would be greatly appreciated.

Regards,
MitchelDZ

I just noticed I sayd: Close VBA in the title. Ofcourse I meant Excel.
Any way to change that?

I found this code:

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But after testing it, it doesn't really work as:
It returns the value 1 in every situation.

I tested it with:

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I figured it out with google:

Code shouldn't be

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but

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Solved, yay