[OPEN] Some initial questions about this component

Using this component, am I able to edit .Lines[n] directly or do I still have to copy the rtb.Lines to a string array to edit the line of text?

I need to set the BG color and FG color of one char position in each line of text...to produce a kind of visual vertical line marker. I am having trouble doing that using the default winform richtextBox...is this component any different or easier to do that task?

Thank you...