The DDE callback function of a DDE debugging application receives this transaction whenever a DDE event occurs in the system. To receive this transaction, an application must specify the APPCLASS_MONITOR flag when it calls the DdeInitialize function.
wFmt
Not used.
hConv
Not used.
hsz1
Not used.
hsz2
Not used.
hData
Identifies a global memory object that contains information about the DDE event. The application should use the DdeAccessData function to obtain a pointer to the object.
dwData1
Not used.
dwData2
Identifies the DDE event. This parameter may be one of the following values:
| Value | Meaning |
| MF_CALLBACKS | The system sent a transaction to a DDE callback function. The global memory object contains a MONCBSTRUCT structure that provides information about the transaction. |
| MF_CONV | A DDE conversation was established or terminated. The global memory object contains a MONCONVSTRUCT structure that provides information about the conversation. |
| MF_ERRORS | A DDE error occurred. The global memory object contains a MONERRSTRUCT structure that provides information about the error. |
| MF_HSZ_INFO | A DDE application created, freed, or incremented the use count of a string handle; or a string handle was freed as a result of a call to the DdeUninitialize function. The global memory object contains a MONHSZSTRUCT structure that provides information about the string handle. |
| MF_LINKS | A DDE application started or stopped an advise loop. The global memory object contains a MONLINKSTRUCT structure that provides information about the advise loop. |
| MF_POSTMSGS | The system or an application posted a DDE message. The global memory object contains a MONMSGSTRUCT structure that provides information about the message. |
| MF_SENDMSGS | The system or an application sent a DDE message. The global memory object contains a MONMSGSTRUCT structure that provides information about the message. |
The callback function should return 0 if it processes this transaction.
DdeAccessData, DdeInitialize