My users load up a text file into a RichTextBox. My program then reads their text file line by line and does some operations requested by the user on each line.

I have a label that displays what line # the program is currently processing, but I would like to actually highlight that line in the RichTextBox where their file is loaded, so they can see the actual line being processed.

So, once the program started, it would highlight line 1 in the RTB and when the program moved to the next line it would highlight line 2 and so on.

It would scroll the file before your eyes and be beautiful... BUT I can't figure it out!

Any tips or leads greatly appreciated!!