This function is issued by a client application to one or more other applications, to request initiation of a dynamic data exchange conversation with a national language conversation context.

#define INCL_WINDDE /* Or use INCL_WIN, INCL_PM, */
#include <os2.h>

HWND            hwndClient;    /*  Client's window handle. */
PSZ             pszAppName;    /*  Application name. */
PSZ             pszTopicName;  /*  Topic name. */
PCONVCONTEXT    pContext;      /*  Conversation context. */
BOOL            rc;            /*  Success indicator. */

rc = WinDdeInitiate(hwndClient, pszAppName,
       pszTopicName, pContext);