SetVar::operator char* ()
{
	if (szName == "Passwd")//only create a md5 hash for the password, not anything else
	{
		std::string pwd;
		//here i need to convert 'sVal' from a String to a std::string called 'pwd'
		return md5.getHashFromString(pwd);
	}
	return sVal;
}

// types.cpp
//
 
#include "types.h"
 
//
// String
//
 
String::String()
{
	szStr = NULL;
}
 
String::String(char *str)
{
	*this = str;
}
 
String::~String()
{
	if (szStr) {
		free(szStr);
		szStr = NULL;
	}
}
 
String& String::operator= (char *str)
{
	if (szStr) {
		free(szStr);
		szStr = NULL;
	}
 
	if (str)
		szStr = strdup(str);
 
	return *this;
}
 
String::operator char* ()
{
	return szStr;
}
 
bool String::operator== (char *str)
{
	if (!strcmp(szStr, str))
		return true;
	else
		return false;
}

// types.h
//
 
#ifndef TTYPES_H
#define TTYPES_H
 
#include <windows.h>
 
typedef unsigned char uchar;
typedef unsigned short ushort;
typedef unsigned int uint;
typedef unsigned long ulong;
 
#define WSTD_DEL(x) { if ((x)) { delete (x); (x)=NULL; } }
#define WSTD_DELM(x) { if ((x)) { delete[] (x); (x)=NULL; } }
 
//
// String
//
 
class String
{
	public:
		String();
		String(char *str);
		~String();
 
		String& operator= (char *str);
		operator char* ();
 
		bool operator== (char *str);
 
	private:
		char *szStr;
};
 
#endif

//...
md5.getHashFromString(pwd.c_str());
//...

#include <sstream>
#include <string>
 
using namespace std;
 
string convert(char *customString)
{
       stringstream s;
       s << customString;
       string d = s.str();
       return d;
 
}

class String
{
	public:
		String();
		String(char *str);
		~String();

		String& operator= (char *str);
		operator char* ();
        const char* c_str() {return szStr;} 
		bool operator== (char *str);

	private:
		char *szStr;
};

String::operator std::string() const
{
    return szStr;
}