Thread: How do I get the free space on the CDROM?

I currently made this code:


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

Code:

#define MAX_OF_HARD_DISKS   24 
static char HardDiskLetters[MAX_OF_HARD_DISKS][4]={ 
   "c:\\",   "d:\\",   "e:\\",   "f:\\",   "g:\\",   "h:\\", 
   "i:\\",   "j:\\",   "k:\\",   "l:\\",   "m:\\",   "n:\\", 
   "o:\\",   "p:\\",   "q:\\",   "r:\\",   "s:\\",   "t:\\", 
   "u:\\",   "v:\\",   "w:\\",   "x:\\",   "y:\\",   "z:\\" 
}; 


int main() 
{ 
   ULARGE_INTEGER AvailableToCaller, Disk, Free; 
   int iCounter; 
   CString Temp; 

   for(iCounter=0;iCounter<MAX_OF_HARD_DISKS;iCounter++) 
   { 
      if(GetDriveType(HardDiskLetters[iCounter])==DRIVE_CDROM) 
      { 
         cout << HardDiskLetters[iCounter] << endl; 

         GetDiskFreeSpaceEx(HardDiskLetters[iCounter],&AvailableToCaller,&Disk, &Free); 

         Temp.Format("Free: %I64d (MB)\r\n",Free.QuadPart/1024/1024); 

         cout << Temp << endl; 

      } 

   } 
   return 0; 
}

But it always returns 0 MB on whatever CD I put...

Any ideas?

Thanks!

I don't understand... please, explain what you mean... yes, I know that regular CDs are 640 MB, but what does this have to do with my question or my code?

Thanks!

There is no empty space on a finished CD... no matter how much data is on it.