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                           dos_getdiskfreespace

   Usage
   #include <dos.h>
   long dos_getdiskfreespace(int drive);

   Description
   Returns  a long integer of available disk space. Drive is  an  integer
   value where 0 = default, 1 = A:, 2 = B: 3 = C:, etc...

   Example
   #include <stdio.h>
   #include <dos.h>

   main()
   {

        printf("Free space on default drive is %ld bytes\n"
                  ,dos_getdiskfreespace(0));
   }

   Return Value
   Returns a long integer of available disk space.