How To Programmatically Trigger a SNMP Trap

      BOOL WINAPI SnmpExtensionInit(
          IN  DWORD               dwTimeZeroReference,
          OUT HANDLE              *hPollForTrapEvent,
          OUT AsnObjectIdentifier *supportedView)
      {
          SECURITY_ATTRIBUTES sa;
          SECURITY_DESCRIPTOR sd;

          sa.nLength = sizeof(SECURITY_ATTRIBUTES);
          sa.bInheritHandle = TRUE;
          sa.lpSecurityDescriptor = &sd;

          if(!InitializeSecurityDescriptor(&sd,
                                           SECURITY_DESCRIPTOR_REVISION))
              return FALSE;   // Handle errors.

          // Add a NULL DACL to the security descriptor.
          if(!SetSecurityDescriptorDacl(&sd, TRUE, (PACL)NULL, FALSE))
              return FALSE;   // Handle errors.

          // Record the time reference provided by the Extendible Agent.

          dwTimeZero = dwTimeZeroReference;


          // Create a named Event that will be used to communicate the
          // occurrence of traps to the Extendible Agent. The Extension
          // Agent will assert this Event when a trap has occurred. This
          // is explained later.

          // A named event is created with a null DACL such that other
          // processes are able to signal this Event as this Extension
          // agent does.

        if ((*hPollForTrapEvent =
             CreateEvent(&sa, FALSE, FALSE, TEXT("_MyTrapEvent"))) == NULL)
          {
              // Indicate error?, be sure that NULL is returned to
              // Extendible Agent.
          }

          // Indicate the MIB view supported by this Extension Agent, an
          // object identifier representing the sub root of the MIB that
          // is supported.

          *supportedView = MIB_OidPrefix; // NOTE!  structure copy


          // Record the trap Event. This example Extension Agent
          // simulates traps by generating a trap after every given number
          // of processed requests.

          hSimulateTrap = *hPollForTrapEvent;


          // Indicate that Extension Agent initialization was successful.

          return TRUE;

      } // end SnmpExtensionInit().
						

      #include <windows.h>
      #include <stdio.h>

      void main(void)
      {
          HANDLE hTrapEvent;
          char c;

          hTrapEvent = OpenEvent(EVENT_MODIFY_STATE, FALSE,
                                 TEXT("_MyTrapEvent"));
          if (hTrapEvent == NULL)
          {
              printf(TEXT("Can't open the event _MyTrapEvent\n"));
              return;
          }
          printf(TEXT("Hit t [enter] to trigger the sending of trap: \n"));
          while (1)
          {
              scanf("%c", &c);
              if (c == 't' || c == 'T')
                  SetEvent(hTrapEvent);
          }
      }