The interface files

The interface consists of the file

IGSS_DDE.EXE

This is the DDE server.

If the default startup files are used to start the supervision system, there is no need to think about these files.
The Windows server process has to be started manually (for example as a user program) or automatically by the client. Most high-level DDE clients, like Microsoft Excel, will try to start the server, when needed.

To make things work, data collection must be running and a configuration must be loaded.