C / C++ / MFC

 TCHAR lpVolumeNameBuffer[256];
 DWORD VolumeSerialNumber;
 DWORD MaximumComponentLength;
 DWORD FileSystemFlags;
 TCHAR lpFileSystemNameBuffer[256];

if ( GetVolumeInformation(
         _T("C:\\"),               // address of root directory of the file system
         lpVolumeNameBuffer,             // address of name of the volume
         255,                            // length of lpVolumeNameBuffer
         &VolumeSerialNumber,            // address of volume serial number
         &MaximumComponentLength,        // address of system's maximum filename length
         &FileSystemFlags,               // address of file system flags
         lpFileSystemNameBuffer,         // address of name of file system
         255                             // length of lpFileSystemNameBuffer
   ) )
     {
      return VolumeSerialNumber;
  }
 else
     return 0;

<br />
	char idata[256];<br />
	ifstream a_file ( "data/text.dat" );<br />
	while (! a_file.eof() )<br />
	{<br />
		a_file.getline(idata,256);<br />
                cout<< idata <<endl;<br />
        }<br />

ifstream& operator>>(ifstream& i_stream,CMyClass MyClass)
{
   i_stream>>MyClass.Data1;
   i_stream>>MyClass.Data2;
   ....
   ....
   return i_stream;
}

ifstream is(.....);
CMyClass Class;
is>>Class; 

ifstream& operator>>(ifstream& is,CMyClass MyClass)
{
   MyClass>>data1;
   if (is.eof())
   {
      CFileException exception(....);
      throw exception;
   }

   MyClass>>data2;
   if (is.eof())
   {
      CFileException exception(....);
      throw exception;
   }

   ....
}

ifstream is(.....);
CMyClass Class;
do {
    is>>Class;
while (!is.eof())