I wrote a DDE server program in LabVIEW 5.1.1. One of our customers is writing the client program in Clarion 5.5. The combination unfortunately is not working. I've tested my server program by just writing the client side in LabVIEW, as well as Delphi and they are both working. My customer did the same thing and his clientprogram is working with a server written in Clarion. He can also make a connection with Excel. Do you know something about an unconformity between LabVIEW and Clarion concerning DDE ?