[in] Pointer to the CEGUID that contains the globally unique identifier of a mounted database.
A valid CEOID indicates success. Zero indicates failure or a lack of additional databases.
To find all matching databases, CeFindNextDatabaseEx (RAPI) is called in a loop until 0 is returned. When enumeration is complete, the hEnum handle must be closed by calling the CeCloseHandle (RAPI) function.