Error Report

[veevinodh@xxxxxxxxx (vinodh)]

I've some problem for pjsip. I've attached sample pjsip code. But it's not
build.my error given below.i'm using Visual studio 8. what can i do? Help

error LNK2019: unresolved external symbol _pjsua_verify_url referenced in
function _main


-- 
Vinodh.M




-- 
Vinodh.M
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	 #include <pjnath.h>
         #include <pjsip.h>
         #include <pjsip_ua.h>
         #include <pjsip_simple.h>
         #include <pjsua-lib/pjsua.h>
         #include <pjmedia.h>
         #include <pjmedia-codec.h>
         #include <pjsua-lib/pjsua.h>
 #define THIS_FILE       "APP"
 #define SIP_DOMAIN      "192.168.2.6"
 #define SIP_USER        "vinodh"
 #define SIP_PASSWD      "vinodh"
 
 /* Callback called by the library upon receiving incoming call */
static void on_incoming_call(pjsua_acc_id acc_id, pjsua_call_id call_id,
                              pjsip_rx_data *rdata)
 {
     pjsua_call_info ci;
 
    PJ_UNUSED_ARG(acc_id);
     PJ_UNUSED_ARG(rdata);
 
     pjsua_call_get_info(call_id, &ci);
 
     PJ_LOG(3,(THIS_FILE, "Incoming call from %.*s!!",
                          (int)ci.remote_info.slen,
                          ci.remote_info.ptr));
 
     /* Automatically answer incoming calls with 200/OK */
     pjsua_call_answer(call_id, 200, NULL, NULL);
 }
 
 /* Callback called by the library when call's state has changed */
 static void on_call_state(pjsua_call_id call_id, pjsip_event *e)
 {
     pjsua_call_info ci;
 
     PJ_UNUSED_ARG(e);
 
     pjsua_call_get_info(call_id, &ci);
     PJ_LOG(3,(THIS_FILE, "Call %d state=%.*s", call_id,
                          (int)ci.state_text.slen,
                          ci.state_text.ptr));
 }
 
 /* Callback called by the library when call's media state has changed */
 static void on_call_media_state(pjsua_call_id call_id)
 {
     pjsua_call_info ci;
 
     pjsua_call_get_info(call_id, &ci);
 
     if (ci.media_status == PJSUA_CALL_MEDIA_ACTIVE) {
        // When media is active, connect call to sound device.
        pjsua_conf_connect(ci.conf_slot, 0);
        pjsua_conf_connect(0, ci.conf_slot);
    }
 }
 
/* Display error and exit application */
 static void error_exit(const char *title, pj_status_t status)
 {
     pjsua_perror(THIS_FILE, title, status);
     pjsua_destroy();
     exit(1);
 }


 
 /*
00105  * main()
00106  *
00107  * argv[1] may contain URL to call.
00108  */
int main(int argc, char *argv[])
 {
     pjsua_acc_id acc_id;
     pj_status_t status;
 
     /* Create pjsua first! */
     status = pjsua_create();
    if (status != PJ_SUCCESS) error_exit("Error in pjsua_create()", status);

     /* If argument is specified, it's got to be a valid SIP URL */
     if (argc > 1) {
         status = pjsua_verify_url(argv[1]);
        if (status != PJ_SUCCESS) error_exit("Invalid URL in argv", status);
     }
 
     /* Init pjsua */
   {
         pjsua_config cfg;
         pjsua_logging_config log_cfg;
 
        pjsua_config_default(&cfg);
         cfg.cb.on_incoming_call = &on_incoming_call;
         cfg.cb.on_call_media_state = &on_call_media_state;
         cfg.cb.on_call_state = &on_call_state;
 
         pjsua_logging_config_default(&log_cfg);
         log_cfg.console_level = 4;
 
         status = pjsua_init(&cfg, &log_cfg, NULL);
         if (status != PJ_SUCCESS) error_exit("Error in pjsua_init()", status);
     }
 
     /* Add UDP transport. */
    {
         pjsua_transport_config cfg;
 
         pjsua_transport_config_default(&cfg);
        cfg.port = 5060;
         status = pjsua_transport_create(PJSIP_TRANSPORT_UDP, &cfg, NULL);
         if (status != PJ_SUCCESS) error_exit("Error creating transport", status);
     }

     /* Initialization is done, now start pjsua */
     status = pjsua_start();
     if (status != PJ_SUCCESS) error_exit("Error starting pjsua", status);
 
     /* Register to SIP server by creating SIP account. */
     {
         pjsua_acc_config cfg;
 
         pjsua_acc_config_default(&cfg);
         cfg.id = pj_str("sip:" SIP_USER "@" SIP_DOMAIN);
         cfg.reg_uri = pj_str("sip:" SIP_DOMAIN);
         cfg.cred_count = 1;
         cfg.cred_info[0].realm = pj_str(SIP_DOMAIN);
         cfg.cred_info[0].scheme = pj_str("digest");
         cfg.cred_info[0].username = pj_str(SIP_USER);
         cfg.cred_info[0].data_type = PJSIP_CRED_DATA_PLAIN_PASSWD;
         cfg.cred_info[0].data = pj_str(SIP_PASSWD);
 
         status = pjsua_acc_add(&cfg, PJ_TRUE, &acc_id);
         if (status != PJ_SUCCESS) error_exit("Error adding account", status);
     }
 
     /* If URL is specified, make call to the URL. */
     if (argc > 1) {
         pj_str_t uri = pj_str(argv[1]);
         status = pjsua_call_make_call(acc_id, &uri, 0, NULL, NULL, NULL);
         if (status != PJ_SUCCESS) error_exit("Error making call", status);
     }
 
     /* Wait until user press "q" to quit. */
     for (;;) {
         char option[10];
 
         puts("Press 'h' to hangup all calls, 'q' to quit");
         if (fgets(option, sizeof(option), stdin) == NULL) {
             puts("EOF while reading stdin, will quit now..");
             break;
         }
 
         if (option[0] == 'q')
             break;
 
        if (option[0] == 'h')
             pjsua_call_hangup_all();
     }
	
 
     /* Destroy pjsua */
     pjsua_destroy();
 
     return 0;
 }