Highlight specific text in richtextbox C#

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VS2010

I have a form that contains listbox, textboxex and some richtextboxes. When we select any letter name in listbox, it bind the data to all the textboxex and richtextboxes.
i want to highlight some text in richtextbox when we select any letter name from listbox.
eg.

Just a friendly reminder that you have <<OverdueInvCount>> overdue invoice(s), with an overdue balance of <<OverdueInvTotal>>. If you have any questions about the amount you owe, please give us a call and we’ll be happy to discuss it. If you’ve already sent your payment, please disregard this reminder.

all the data coming from database.

i want to highlight <<OverdueInvCount>> and <<OverdueInvTotal>> these words.when i select a letter from listbox.

Posted 5-Feb-13 6:43am

Amit1988nov

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Abhinav S · Answer 1 · 2013-02-05T06:45:00

You will have to build the complete solution on your own.
However, here are some links that might give you some ideas to try out -
http://www.dotnetcurry.com/ShowArticle.aspx?ID=146[^]
Background Highlighting with the RichTextBox the System way.[^]
Enabling syntax highlighting in a RichTextBox[^]