DDCMD_REG_STREAM - Example Code

The following code illustrates how to register a stream instance with a device driver.

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

   ULONG           ulRC;                    /* Error return code      */
   HSTREAM         hstream;                 /* Stream handle          */
   DDCMDREGISTER   ddcmdpb;                 /* Parameter block        */
   PDDCMDFN        pddcmdfn;                /* Pointer to DDCMD entry */
                                            /* point                  */
   ULONG           ulSysFileNum;            /* Global file handle     */
   PSHDFN          pshdfn;                  /* Pointer to SHD entry   */
                                            /* point                  */
   SPCBKEY         spcbkey;                 /* Stream protocol key    */

                             .
                             .
                             .
 /*-------------------------------------------------------------------*/
 /*  Register a stream instance with a physical device driver.        */
 /*-------------------------------------------------------------------*/
   ddcmdpb.ulFunction = DDCMD_REGISTER;
   ddcmdpb.hstream = hstream;
   ddcmdpb.ulSysFileNum = ulSysFileNum;
   ddcmdpb.pSHDEntryPoint = pshdfn;
   ddcmdpb.ulStreamOperation = STREAM_OPERATION_CONSUME;
   ddcmdpb.spcbkey = spcbkey;

  if (ulRC = pddcmdfn (&ddcmdpb))
    return (ulRC);    /* error!*/