FAT32 Information

hello guys i'm new with this message board
i've one program that gets the fat32 info
see this

#include<dos.h>

struct fatinformation
{
/* 63 bytes of structure */
};

main()
{
struct fatinformation fat32;
union REGS regs;
struct SREGS s;

s.es = FP_SEG(&fat32);
regs.x.di = FP_OFF(&fat32);
regs.x.ax = /* function */
regs.h.dl = /* drive */
regs.x.si = /* pointer DPB */
intdosx(&s, &s, &s);

if((regs.h.cf)!= 0)
printf("fail....\n");
else
printf("success...\n");
}

output:
success.....

this program works fine, but i'm getting wrong information
in structure fat32
any one have idea of this