ComXmitAbortProgram is called while uploads and downloads are in
progress. If this is set to a MarxMenu procedure then you can write your
own control routine to control protocol abort. Your program needs to
return either a true to abort or a false to not abort.
Example:
ComXmitAbortProgram = loc XmitAbort
Procedure XmitAbort
if not KbdReady then Return False
Return ReadKey = Esc
EndProc
