(GETKEY(0))
Gets the text value, in brackets, of the first key available in the type-ahead buffer. If a key is not available, GETKEY waits for the next keystroke. Since R:BASE normally checks the buffer for the [Ctrl] + [Break] keys, you must set ESCAPE to off for GETKEY to work properly. Use CHKKEY before GETKEY to determine if a key is available. GETKEY does nothing with the zero that you enter in parentheses; GETKEY returns a value without receiving one.
If you are executing a process that takes several minutes to complete, you can use the CHKKEY and GETKEY functions to tell R:BASE what to do next, even while the process is executing.
