2 questions: 4GL source length limit & screen redraw question

Excuse this first question if it was sent out before, I think I made a mistake and did NOT get it out.... 1) Is there a limit on the # of source lines in a 4GL? I know there is a 32Kbytes limit on functions. I was asking if there was a hard limit at say 20K lines of source or maybe a Kbyte limit. 2) With ^R to redraw the screen and Informix refreshing underlying windows when one is closed it makes sense to think there is some sort of data structure keeping track of what the screen should look like. I would appreciate any information to access that structure. In this case I would like to dump the current screen to a file/printer from an ON KEY(whatever) CALL dumpScreen() type senario. Thanks Paul