Creating a console to retrieve errors.

What I''m looking for is a simple console application that I can write to using a simple command. I have searched in the article section but am unable to find something usefull. At the moment I have to use textboxes to read any output or render it on the screen. I simply want a DOS window which shows the latest output of my application. How would I do this? What techniques are usually being used? Any help would be very appreciated. TY