As illustrated in the following example, a DLL stream handler implements function through an additional entry point. DLL stream handlers must supply an interface to communicate with the Sync/Stream Manager. This interface, called the stream handler command (SHC) interface, exports stream handler commands (SHCs) for use by the Sync/Stream Manager to set up and control data streams. These SHCs are accessible through a single entry point, SHCEntryPoint.

RC ShcRouter(pshc)
PSHC_COMMON pshcNow;

{ /* Start of ShcRouter */

RC rc = NO_ERROR;                       /* local return code */
  switch (pshc->ulFunction)
  {
    case SHC_ASSOCIATE:
         {
           rc = ShcAssociate((PPARM_ASSOC)pshcNow);
           break;
         }
    case SHC_CREATE:
         {
           rc = ShcCreate((PPARM_CREATE)pshcNow);
           break;
         }
    case SHC_DESTROY:
         {
           rc = ShcDestroy((PPARM_DESTROY)pshcNow);
           break;
         }
    case SHC_SEEK:
         {
           rc = ShcSeek((PPARM_SEEK)pshcNow);
           break;
         }
    case SHC_START:
         {
           rc = ShcStart((PPARM_START)pshcNow);
           break;
         }
    case SHC_STOP:
         {
           rc = ShcStop((PPARM_STOP)pshcNow);
           break;
         }
    case SHC_GET_PROTOCOL:
         {
           rc = ShcGetProtocol((PPARM_GPROT)pshcNow);
           break;
         }
    case SHC_INSTALL_PROTOCOL:
         {
           rc = ShcInstallProtocol((PPARM_INSTPROT)pshcNow);
           break;
         }
    case SHC_ENUMERATE_PROTOCOLS:
         {
           rc = ShcEnumerateProtocols((PPARM_ENUMPROT)pshcNow);
           break;
         }
    case SHC_NEGOTIATE_RESULT:
         {
           rc = ShcNegotiateResult((PPARM_NEGOTIATE)pshcNow);
           break;
         }
    default:
         {
           rc = ERROR_INVALID_FUNCTION;
           break;
         }
  } /* endswitch */

  return(rc);

} /* End of ShcRouter */