PC/3270 Response
If PC/3270 can perform the DDE_UNADVISE, PC/3270 returns an ACK message
containing positive status information to the client:
WM_DDE_ACK(wStatus, aSF)If PC/3270 cannot perform the DDE_UNADVISE, PC/3270 returns an ACK message containing negative status information and one of the following return codes in the low-order byte of the wStatus word.
| Return Code | Explanation |
|---|---|
| 1 | Advise has not started yet. |
| 9 | A system error occurred. |