An ESL program that wants to be a DDE partner must minimally satisfy three requirements:

•The program must declare the DDE stimulus library.  The library is called "esldde".

Note: An ESL program should not contain more than one declaration for the DDE stimulus library using different logical names.

•The program must establish itself as a client, a server, or both.

•The program must contain responses to the appropriate DDE events.

If the client or server is a non-ESL program, read that program's documentation to determine how and when it establishes itself as a client or server.