How can I draw an image in flash so it has that nice clean line look, then save the file as a jpeg with out it pixelating on me and going all boxy, do I have to transfer it to another programe to save, or someone said something about the print screen button, and what size/rez etc is best?

Note: these images are to show design work on the web, also for making company logos for use on posters and the such.