Initiate Structured Field Conversation

3270	5250	VT
Yes	Yes	Yes

The Initiate Structured Field Conversation function connects a client application and a host application. This allows the applications to send data to each other and to receive data from each other.

The client sends the following command to initiate a structured field conversation:

SendMessage( -1,
             WM_DDE_INITIATE,
             hClientWnd,
             MAKELONG(aIBM3270, aLUN_xxxx) );

where:

aIBM3270	Identifies the application atom.
aLUN_xxxx	Identifies the topic atom. The string used to create atom aLUN_xxxx is LU appended with the session ID A, B, …, Z, appended with an underscore (_), and appended with the user-defined string of any length.