Extract small string of text from larger string

I’m working on a bit of code that I want to extract a small piece of text form a larger text file.

At the moment I can open and read the entire text file and also pin point a start and end marker of the text I want to extract.

What I’m having trouble doing is creating a variable text string which contains the text between the 2 markers.

What I have so far is

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If it's not a calculation do not use a function but a sub.

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In a function

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Note: it's very misleading to have integer variables whose names start with 'str'!

@snb,
I think you are missing a quote at the start of the msgbox title string.