[in] HRESULT containing the error generated in the previous method call.
[in] Bitmask of flags that controls the type of the returned strings. The following flag can be set:
The strings in the MAPIERROR structure returned in the lppMAPIError parameter are in Unicode format. If the MAPI_UNICODE flag is not set, the strings are in ANSI format.
[out] Pointer to a pointer to the returned MAPIERROR structure containing version, component, and context information for the error. The lppMAPIError parameter can be set to NULL if a MAPIERROR structure with appropriate information cannot be provided.
Call GetLastError whenever you need to display information about an error to the user.
You can make use of the MAPIERROR structure pointed to by the lppMAPIError parameter if the table object supplies one only if GetLastError returns S_OK. Sometimes the table implementation cannot determine what the last error was or has nothing more to report about the error. In this situation, the pointer at lppMAPIError is set to NULL.
To release all the memory allocated for the MAPIERROR structure, call the MAPIFreeBuffer function.