The DDEADVISE structure contains flags that specify how a DDE server application should send data to a client application during an advise loop. A client passes the handle of a DDEADVISE structure to a server as part of a WM_DDE_ADVISE message. This structure supersedes the DDELN structure.
typedef struct { // ddeadv
unsigned short reserved:14,
fDeferUpd:1,
fAckReq:1;
short cfFormat;
} DDEADVISE;
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