cURL w C++

#include <windows.h>
#include <curl/curl.h>
#include <string>
#include <iostream>

using namespace std; 
 
// Write any errors in here 
static char errorBuffer[CURL_ERROR_SIZE]; 
 
// Write all expected data in here 
static string buffer; 
 
// This is the writer call back function used by curl 
static int writer(char *data, size_t size, size_t nmemb, 
                  std::string *buffer) 
{ 
  // What we will return 
  int result = 0; 
 
  // Is there anything in the buffer? 
  if (buffer != NULL) 
  { 
    // Append the data to the buffer 
    buffer->append(data, size * nmemb); 
 
    // How much did we write? 
    result = size * nmemb; 
  } 
 
  return result; 
} 
 
// You know what this does.. 
void usage() 
{ 
  cout << "curltest: \n" << endl; 
  cout << "  Usage:  curltest url\n" << endl; 
}  
 
/*
 * The old favorite
 */ 
int main(int argc, char* argv[]) 
{ 
  if (argc > 1) 
  { 
    string url(argv[1]); 
 
    cout << "Retrieving " << url << endl; 
 
    // Our curl objects 
    CURL *curl; 
    CURLcode result; 
 
    // Create our curl handle 
    curl = curl_easy_init(); 
 
    if (curl) 
    { 
      // Now set up all of the curl options 
      curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errorBuffer); 
      curl_easy_setopt(curl, CURLOPT_URL, argv[1]); 
      curl_easy_setopt(curl, CURLOPT_HEADER, 0); 
      curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1); 
      curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writer); 
      curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer); 
 
      // Attempt to retrieve the remote page 
      result = curl_easy_perform(curl); 
 
      // Always cleanup 
      curl_easy_cleanup(curl); 
 
      // Did we succeed? 
      if (result == CURLE_OK) 
      { 
        cout << buffer << "\n"; 
        exit(0); 
      } 
      else 
      { 
        cout << "Error: [" << result << "] - " << errorBuffer; 
        exit(-1); 
      } 
    } 
  } 
}