Convert number in to Colum Refrences and vise versa

AnsiString MakeCol(int value);  // convert # into column ref A,B,C...AA,AB...
int MakeNum(AnsiString string); // convert column into #
void main()
{
  // A,B,C...Z,AA,AB,..AZ,BA,BC...ZZ,AAA,AAB... and so on
  int col=1; // value must be >1 & <=MAXINT to properly work
  AnsiString string;  // just a string to use
  do
  {
   cout << "Enter value to convert (0 for exit) ";
   cin >> col;
   string = MakeCol(col); // copy the sting to as string for handeling
   cout << MakeNum(string) << "= " << string.c_str() << endl;
  }
  while(col>0);
}
AnsiString MakeCol(int value)
{
  AnsiString Finalstring;
  int overz=0;
  if(value<=AlphaSize) // if it is A-Z
   return( char(value+AsciiText) );
  if(value>AlphaSize)  // if it goes beyond Z
  {
   while(value>AlphaSize)  // calculate how many times it goes beyond Z
   {
     overz++; // add to over singel digit counter
     value-=AlphaSize;
   }
   //_____________Recurse_Call__________________________
   Finalstring+=MakeCol(overz);  // recursively convert
  }
  Finalstring+=char(value+AsciiText); // append letter to back of string
  return(Finalstring);
}
int MakeNum(AnsiString string)
{
  string=string.UpperCase(); // make string uppercase letters
  char *TrueString=string.c_str(); // make into string of characters
  int length=string.Length();  // find length of string
  int value=0; // whole value of string as int
  int lcv=0;  // loop controll variable
  if(!length)  // no size to string
   return(0); // string is empty return with error
  // check to be sure string is of valid character (ONLY LETTERS any case)
  for(lcv=0;lcv<length;lcv++)
   if((TrueString[lcv] < AsciiA) || (TrueString[lcv] > AsciiZ)) // proper ?
     return(0); // return 0 for error with string
  if(length==1) // singel character column number
   value+=int(TrueString[0]-AsciiText);  // give proper value of cahracter
  if(length>1)  // string contains more than one character
  {
   value+=int(TrueString[length-1]-AsciiText); // remove leading value of 64
   for(lcv=2;lcv<=length;lcv++)
   {
     value+=(int(TrueString[length-lcv]-AsciiText) * AlphaSize);
   }
  }
  return(value);
}