Limit the size and the content of string

I was wondering if there is an easy way, predefined limit the number of characters, and what characters are allowed in a string.  I want to limit a string of 20 characters and does not allow for the apostrophe, comma, etc..  I'm sure I can this program, but thought it might already be something I could use?

Asked several times in the past. Have you tried a search: http://forums.ni.com/t5/forums/searchpage/tab/message?location=Node%3A170&q=limit+string+length#mess...

Tags: NI Software

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