New to Informix - question about <esc>

Hi, I'm absolutely new to Informix coming from a DB/2 background. I'm trying to learn by books and example. My question: I've seen references to <esc>, the escape key. I can't find this in books and was wondering if this is something that one programs or if this is an Informix 4GL convention that means something special? If so, what does it mean? I'm trying to follow the flow of the programs and I see <esc> on the screen forms and menu, but not in the programs. BTW, I'm not talking about escaping a character like in C. Thanks in advance for your help. --Laurie Solgon --lsolgon@naig.com