I am trying to enable asynchronous DDE comunications between my VFP5 app and a C program. I have succeeded with DDE between two VFP 'prg' files each running under a seperate Windows' session. I want to duplicate this using VFP SDI forms.

I have the following code in one of my Form's INIT Method:

* Set-Up Server
=DDESetService('VFP','DEFINE')
=DDESetService('VFP','EXECUTE',.T.)
=DDESetService('VFP','REQUEST',.T.)
=DDESetService('VFP','POKE',.T.)

* Set-Up our main topic and the UDF name that
* will handle the DDE message we are processing.

WITH This
.cItem = 'MYCMD'
= DDESetTopic('VFP',.cItem,'Thisform.dispatch')
* Become Client for C++ program
.nChannel = DDEInitiate('CPP',.cItem)
ENDWITH

When I run the form, I get an error while the program tries to execute the command :

= DDESetTopic('VFP',.cItem,'Thisform.dispatch')

For some reason, VFP doesn't recognize 'Thisform.dispatch' as a valid UDF which is meant to be executed when the Server sends data back to the form.

I need to initialize DDE comunication from within a form so that I can display data sent to me from the DDE Server.

What to do?

Any help is appreciated...