Personal Communications Response

Personal Communications receives the keystrokes and sends them to the presentation space. If the presentation space does not accept the keystrokes, a reset is sent to the presentation space and the keystrokes are sent again. This procedure continues until the presentation space accepts the keystrokes or the retry count is reached. If Personal Communications cannot send the keystrokes to the host, Personal Communications returns a negative ACK message containing one of the following status codes in the low-order byte of the wStatus word. Otherwise, Personal Communications returns a positive ACK message signalling the keystrokes have been sent.
WM_DDE_ACK(wStatus, aKEYS)
Return Code Explanation
1 Retry count is not valid.
2 Type of key strokes is not valid.
6 The specified format is not valid.
9 A system error occurred.