| Navigation: Language Reference > App A - DDE, OLE, and OCX > DDE Procedures >====== DDEACKNOWLEDGE (send acknowledgement from DDE server) ====== |    |
DDEACKNOWLEDGE( response )
| DDEACKNOWLEDGE | Sends acknowledgement of the current DDEPOKE or DDEEXECUTE statement sent to the DDE server. |
| Response | An integer constant, variable, or expression containing zero (0) or one (1) to indicate negative or positive acknowledgement. |
The DDEACKNOWLEDGE procedure allows a DDE server program to immediately acknowledge unsolicited data sent from DDEPOKE, or commands sent from DDEEXECUTE. This allows the client application to immediately continue its processing. Although a CYCLE statement after EVENT:DDEpoke or EVENT:DDEexecute also signals positive acknowledgement to the client, DDEACKNOWLEDGE allows you to send negative acknowledgement.
Example:
!The client application's code contains:
WinOne WINDOW,AT(0,0,160,400)
END
SomeServer LONG
DDEChannel LONG
CODE
OPEN(WinOne)
DDEChannel = DDECLIENT('MyServer','System') !Open a channel to MyServer app
DDEEXECUTE(DDEChannel,'[ShowList]') !Tell it to do something
!The server application's code contains:
WinOne WINDOW,AT(0,0,160,400)
END
DDEChannel LONG
CODE
OPEN(WinOne)
DDEChannel = DDESERVER('MyServer','System') !Open channel
ACCEPT
CASE EVENT()
OF EVENT:DDEExecute
CASE DDEVALUE() !Check the requested action
OF 'ShowList'
DDEACKNOWLEDGE(1) !Send positive acknowledgement
DO ShowList !and take the action
ELSE !If requested action is unknown
DDEACKNOWLEDGE(0) !Send negative acknowledgement
END
END
END
See Also: