&ZAPPCRTS

Returns a character string when using the APPC facility.

&ZAPPCRTS returns a character string, equivalent to that of the LU6.2 REQUEST_TO_SEND_RECEIVED parameter (that, is either YES or NO).

Example: &ZAPPCRTS

&IF &ZAPPCRTS EQ YES &THEN +
  &GOSUB .RECV

Note: &ZAPPCRTS is either YES or NO. It is set to NO when the conversation is started. If during conversation operation a REQUEST_TO_SEND is issued by the conversation partner , this system variable reflects a value of YES. The YES value persist until the local conversation enters receive state, hence allowing the conversation partner to send, at which time the value reverts to NO, regardless of whether the system variable was ever examined by the local procedure.