EVCB

This structure describes an event. It is used by an application media control device to enable an event for an SpiEnableEvent call. Stream handlers use this same data structure to report events. Most of the system-defined events have a corresponding event control block, which is the same structure with some different field names and uses.

typedef struct _EVCB {
  ULONG       ulType;        /*  Event type. */
  ULONG       ulSubType;     /*  Event subtype. */
  ULONG       ulFlags;       /*  Flags. */
  HSTREAM     hstream;       /*  Stream handle. */
  HID         hid;           /*  Stream handler ID. */
  ULONG       ulStatus;      /*  Event status. */
  ULONG       ulEventParm1;  /*  I/O parameter. */
  ULONG       ulEventParm2;  /*  I/O parameter. */
  ULONG       ulEventParm3;  /*  I/O parameter. */
} EVCB;

typedef   EVCB   FAR   * PEVCB ;