Input without waiting (Re: random maze generator)

[Dr. oTTo]

First, let me say thanks to the people who sent me random maze
generators. I've finally got one that's working the way I want it
too.

But now I have another question:  
   How do I check to see if a character has been entered on the keyboard, 
   and if so, how do I read just that character.        

I need to know this since I'm working on a game.

thanks,
scott