How to determine line count in single multiline textbox

I have data that comes out of a sql db text field that already has line breaks and paragraph breaks. I would like to determine how many lines this will be (w/ line wrapping on) so that I can say if over 20 lines font = 12 pt. etc. How do you determine how many lines there are in a multiline textbox? In .net a textbox can be called w/ .linecount to get the # of lines.
How can I accomplish this in Crystal Reports?
Any help would be appreciated.
Dave

That would work if we had full lines of Text. The problem is that we have line breaks and paragraphs which would prevent lines from being full. Here is an example:
My name is Dave.
I went to the store today and bought some bread, lunch meat, juice,
and wine.
Signed by:
David
08/01/2008
The middle section could be x lines long. But as it grows I need to shrink the font since there is a finite amount of height for the textbox.
Thanks for the idea,
Dave

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How to determine line count in single multiline textbox

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