This structure contains fields for the SHC_STOP message.
typedef struct _PARM_STOP {
  ULONG       ulFunction;  /*  Handler command function. */
  HID         hid;         /*  Handler ID. */
  HSTREAM     hstream;     /*  Handle of stream instance. */
  ULONG       ulFlags;     /*  Stop flags. */
} PARM_STOP;
typedef   PARM _ STOP   FAR   * PPARM _ STOP ;