C / C++ / MFC

FILE* in ;
err = fopen_s (&in, fileName.c_str(), "r");
if (!in) {
	std::cerr << "cannot open input file '" << fileName << "'" << std::endl;
	return;
}
char buff[1024];
while (fgets(buff, 1024, in)) {

	std::string line=buff;
//...

#ifndef CONFIGFILEAPI_H_INCLUDED
#define CONFIGFILEAPI_H_INCLUDED

#include <string>
#include <vector>

namespace cfgFileLib
{
//open and parse a file
// Returns:
//  empty string "" if succesful
//  error description if not
std::string openConfigFile (const std::string & fileName);

//check if a symbol is defined
bool isDefined (const std::string & symbol);

//how many values are assigned this symbol
int howMany (const std::string & symbol);

//get first (or only) value assigned to the given symbol
bool getBool (const std::string & symbol);
int getInt (const std::string & symbol);
double getDouble (const std::string & symbol);
std::string getString (const std::string & symbol);

//get all the values assgined to the given symbol
std::vector <bool> getAllBool (const std::string & symbol);
std::vector <int> getAllInt (const std::string & symbol);
std::vector <double> getAllDouble (const std::string & symbol);
std::vector <std::string> getAllString (const std::string & symbol);
}
#endif

Hi I am beginner in c++ , I have a console project and want to convert it to windows application , after 6-7 days trying I couldn't convert it and when I compile project I have many more errors

This is my console project: http://uploaded.net/file/8yv5u1s7

Please convert it for me to windows gui application to help me thanks a lot