This data structure contains fields for the DDCMD_STATUS message.
typedef struct _ddcmd_status_parm {
ULONG ulFunction; /* Function requested by stream handler. */
HSTREAM hStream; /* Stream handle. */
PSTATUS_PARM pStatus; /* Pointer to STATUS_PARM. */
ULONG ulStatusSize; /* Size or position time. */
} DDCMDSTATUS;