can t connect my ssh client to the remote machine - ssh

Question

I've downloaded and compiled libssh 0.6.1 from libSSH and linked the ssh.lib,ssh.dll to a visual c++ project .
The code below compiles and run fine , but when calling ssh_connect() , it return -1 : Failed to connect : No error.
Also, I used putty to connect to my remote machine and it works fine.
here is my code:
// sshClient.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <stdlib.h>
#include <libssh/libssh.h>
int _tmain(int argc, _TCHAR* argv[])
{
ssh_session my_ssh_session;
int verbosity = SSH_LOG_PROTOCOL;
int port = 22;
char* host="127.0.0.1";
ssh_channel channel;
int rc;
//I create a session
my_ssh_session = ssh_new();
if (my_ssh_session == NULL)
exit(-1);
ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, host);
ssh_options_set(my_ssh_session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity);
ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);
ssh_options_set(my_ssh_session, SSH_OPTIONS_USER,"true");
rc = ssh_connect(my_ssh_session);
if (rc != SSH_OK) {
fprintf(stderr, "Error connecting to 192.168.78.131 : %s\n", ssh_get_error(my_ssh_session));
exit(-1);
}
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
//Here I create a channel
channel = ssh_channel_new(my_ssh_session);
if (channel == NULL)
return SSH_ERROR;
if (SSH_OK != ssh_channel_open_session(channel)) {
printf("ssh_channel_open_session");
ssh_channel_free(channel);
return rc;
}
//My remote command ls -l under true Folder
rc = ssh_channel_request_exec(channel, "ls -l");
if (rc != SSH_OK){ ssh_channel_close(channel);
ssh_channel_free(channel);
return rc;
}
char buffer[256];
unsigned int nbytes;
nbytes = ssh_channel_read(channel, buffer, sizeof(buffer), 0);
while (nbytes > 0){
if (fwrite(buffer, 1, nbytes, stdout) != nbytes)
{ ssh_channel_close(channel);
ssh_channel_free(channel);
return SSH_ERROR;
}
nbytes = ssh_channel_read(channel, buffer, sizeof(buffer), 0);
}
if (nbytes < 0){
ssh_channel_close(channel);
ssh_channel_free(channel);
return SSH_ERROR;
}
ssh_channel_send_eof(channel);
ssh_channel_close(channel);
ssh_channel_free(channel);
ssh_free(my_ssh_session);
system("pause");
return 0;
}

Answer 1

Check your host IP address. I guess you forgot to change the IP address in the example source file.