SpiGetProtocol - Example Code

The following code illustrates how to query a stream handler for a specific stream protocol.

#include        "os2.h"
#include        "os2me.h"

  ULONG         ulRC;                       /* Error return code   */
  HID           hidTarget;                  /* Target handler ID   */
  SPCBKEY       spcbkey;                    /* Data type to stream */
  SPCB          spcb;                       /* Stream protocol     */
                            .
                            .
                            .
/*--------------------------------------------------------------------*/
/*  Get the stream handler ID (hidTarget) for the digital audio stream*/
/*  handler using SpiGetHandler.                                      */
/*---------------------------------------------------------------------/
                            .
                            .
                            .

/*--------------------------------------------------------------------*/
/*  Get the stream protocol control block (SPCB) for the given stream */
/*  handler and SPCB key.                                             */
/*--------------------------------------------------------------------*/
  spcbkey.ulDataType = DATATYPE_WAVEFORM;
  spcbkey.ulDataSubType = WAVE_FORMAT_4S16;
  spcbkey.ulIntKey = 0;

  if (ulRC = SpiGetProtocol( hidTarget, &spcbkey, &spcb))
     return(ulRC);                               /* error! */