Initiate System Conversation

3270	5250	VT
Yes	Yes	Yes

The Initiate System Conversation function connects a client application to the system conversation. Only one client can be connected to the system conversation at a given time. The client sends the following command to initiate a system conversation:

SendMessage( -1,
             WM_DDE_INITIATE,
             hClientWnd,
             MAKELPARAM(aIBM327032, aSystem) );

where:

aIBM327032: Identifies the application atom.
aSystem: Identifies the topic atom.