select line and highlight in richtextbox

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I'm working with a richtextbox. But I have a problem:
I need highlight line at textpointer. Not highlight text.
please help me! thank so much!

Posted 8-Mar-11 14:08pm

trieuquangphuc_cf

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Sergey Alexandrovich Kryukov 8-Mar-11 20:18pm

Not clear. Is it selecting?
--SA

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Andrew Rissing · Answer 1 · 2011-03-08T14:52:00

If you're just trying to highlight a line, the basic idea is to just do the following:

1) Take the current cursor position and decrement by one till you hit a newline character ('/r' or '/n'). Increment by one. You're now at the start of the line.

2) Take the current cursor position (before step one) and increment by one till you hit a newline character. Decrement by one. You're now at the end of the line.

3) Take the two positions from step 1 and 2 and perform a highlight.

I could provide more specifics, but it depends on what exactly you're trying to do, which isn't 100% clear from your question.