Generally, a DDE command consists of three elements - the name of the service being used, the topic, and the item.
For the CIMPLICITY to Windows Server:
The service is CWSERV.
The topics supported are POINT and SYSTEM. Use the Point topic to display CIMPLICITY point information. Use the System topic to display CWSERV system information.
The items supported for the SYSTEM topic are FORMATS, SYSITEMS, TOPICS, and HELP.
The format of a particular DDE command depends on how it has been implemented in the application where you are using it.
Microsoft Excel example.
About the CIMPLICITY to Windows Server.