help with textarea

first off, I have looked all over the help file. can’t find what I am looking for, so I don’t even know if its possible.
what I would like to do it double click on a line of text in a multi line text area and get the selected text.
is this possible.


Double click is the tricky part. Looks like they got it working here:

SelText should get you whatever is selected regardless of how it was selected