DOCERR: DDEDATA Documentation Error

 Last reviewed: March 2, 1995
Article ID: Q93372
The information in this article applies to:
  • Microsoft Windows Software Development Kit (SDK) for Windows versions 3.1 and 3.0

SUMMARY

Page 272 of the Windows SDK (Software Development Kit) version 3.1 "Programmer's Reference, Volume 3: Messages, Structures, and Macros" contains an error. The fAckReq field of the DDEDATA structure describes what should be the fResponse field, and vice versa.

In addition, the DDEDATA structure documented on page 15-11 of the Windows SDK version 3.0 "Reference, Volume 2" incorrectly describes what should be the fResponse field, as fRequested.

MORE INFORMATION

The Windows SDK versions 3.0 and the 3.1 both define the DDEDATA structure in DDE.H as follows: 

     typedef struct tagDDEDATA
     {
         WORD  unused: 12,
                          fResponse:1,
                          fRelease:1,
                          reserved:1,
                          fAckReq:1;
         int            cfFormat;
         BYTE     value[1];
     } DDEDATA;
The WM_DDE_DATA documentation for Windows SDK versions 3.0 and 3.1 correctly describes the structure's fAckReq field. fAckReq is a flag to indicate whether the server application expects to be acknowledged by the client application (with a WM_DDE_ACK) when data is received.

The fResponse field, on the other hand, is just a means to distinguish whether the WM_DDE_DATA message the client received was sent in response to a WM_DDE_REQUEST (if it is, it is set to TRUE) or WM_DDE_ADVISE (in which case it is set to FALSE).

Additional reference words: 3.00 3.10
KBCategory: kbprg kbdocerr
KBSubcategory: UsrDde

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Last reviewed: March 2, 1995
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