#include <windows.h>
#include <lmaccess.h>
#include <iostream>

#pragma comment( lib, "netapi32.lib" )

using namespace std;

// EnumUsers: enumerates the users that may use this system
void EnumUsers()
{
 // variables
 NET_DISPLAY_USER* ndu;
 DWORD entRead;
 int maxForLoop = 0;
 int err;
 char buff[80];
 
 // print info
 cout << "Enumerating users..." << endl;

 // enumerate the users
  // initialize err to get the data
  err = NetQueryDisplayInformation( NULL, 1, 0, 500, sizeof( NET_DISPLAY_USER ), &entRead, (PVOID*) &ndu );
  while( err == ERROR_MORE_DATA )
  {
   // convert the name to a multibyte string
   wcstombs( buff, ndu->usri1_name, GNLEN );
   // output it
   cout << buff << endl;
   // set error to the return value of the function
   err = NetQueryDisplayInformation( NULL, 1, ndu->usri1_next_index, 500, sizeof( NET_DISPLAY_USER ), &entRead, (PVOID*) &ndu );
  }
}

int main()
{
	EnumUsers();

	return 0;
}