Changing Colors in RTF without selecting, possible?

I have a program that assign color to words dynamicly while the user input the text. My problem is that selecting the text to change the color with a rtf control even if it's fast and doesnt show too much doesnt look profesionnal. Any suggestions?

I need the same thing, but I'd like to point out that if this could be done by using a different text edition control that would be a good solution, I don't HAVE to use a Rich Text Box.

What I need to do is to set font colors (for parts of the text, such as words, lines, quoted strings) in a way similar to the way Visual Basic itself sets colors for reserved words and comments. Any control that can do that would help terribly.

Thanks in advance,