Simple application

hi,

I'am trying to use example to learn net-snmp library use.
So, i just code the following (see below), but it exits with error:

ack:  (apptest.net-snmp.org)
something horrible happened!!!


What could be the error ?

Thks
gilles


------------------------------------------------------
#include <windows.h>
#include <iostream>
#include <fstream>

#ifdef _VCPP_
#include "consredirect.h"
#endif

#include <net-snmp/net-snmp-config.h>
#include <net-snmp/session_api.h>
#include <net-snmp/library/snmp_logging.h>


using namespace std;

///////////////////////////////////////////////////////////////////////////////
// WINSOCK
// WINSOCK
// WINSOCK
void winsock_cleanup(void)
{
    WSACleanup();
}

///////////////////////////////////////////////////////////////////////////////
// WINSOCK
// WINSOCK
// WINSOCK
char *winsock_startup(void)
{
    WORD            VersionRequested;
    WSADATA         stWSAData;
    int             i;
    static char     errmsg[100];

	/* winsock 1: use MAKEWORD(1,1) */
	/* winsock 2: use MAKEWORD(2,2) */

    VersionRequested = MAKEWORD(2,2);
    i = WSAStartup(VersionRequested, &stWSAData);
    if (i != 0) {
        if (i == WSAVERNOTSUPPORTED)
            sprintf(errmsg,
                    "Unable to init. socket lib, does not support 1.1");
        else {
            sprintf(errmsg, "Socket Startup error %d", i);
        }
        return (errmsg);
    }
    return (NULL);
}


///////////////////////////////////////////////////////////////////////////////
// MAIN
// MAIN
// MAIN
#define SOCK_STARTUP winsock_startup()
#define SOCK_CLEANUP winsock_cleanup()

//int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPTSTR 
lpCmdLine,int nCmdShow)
int main(int argc, char *argv[])
{
	//----
	struct snmp_session snmpsession, *ss;

	#ifdef _VCPP_
	RedirectIOToConsole();
	#endif

	//----
	cout<<"Essai d'un serveur de reception de traps"<<endl;

	init_snmp("snmpapp");
	snmp_enable_stderrlog();
	snmp_sess_init(&snmpsession);
	snmpsession.peername = "apptest.net-snmp.org";


    /* set the SNMP version number */
    snmpsession.version = SNMP_VERSION_1;

    /* set the SNMPv1 community name used for authentication */
    snmpsession.community = (unsigned char *)"public";
    snmpsession.community_len = strlen((char *)snmpsession.community);

	SOCK_STARTUP;

	/*
     * Open the session
     */
    ss = snmp_open(&snmpsession);                     /* establish the 
session */
	if(!ss) {
		snmp_perror("ack");
        snmp_log(LOG_ERR, "something horrible happened!!!\n");
		SOCK_CLEANUP;
		Sleep(2000);
        exit(2);
	} else {
		cout<<"Ok SNMP open"<<endl;
	} // end if


	cout<<"Version:"<<snmpsession.version<<endl;


	Sleep(2000);

	SOCK_CLEANUP;

	return 0;
}
------------------------------------------------------




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