int div64(int hi, int lo, int divisor, int *premainder)
{
   __asm
   {
      mov   edx, DWORD PTR [hi];
      mov   eax, DWORD PTR [lo];
      idiv  DWORD PTR [divisor]
      mov   ecx, DWORD PTR [premainder]
      mov   DWORD PTR [ecx], edx
   }
}

----------------

PUBLIC	?div64@@YGHHHHPAH@Z				; div64
_TEXT	SEGMENT
_hi$ = 8						        ; size = 4
_lo$ = 12					            ; size = 4
_divisor$ = 16					      	; size = 4
_premainder$ = 20				    	; size = 4
?div64@@YGHHHHPAH@Z PROC				; div64, COMDAT
	mov	 edx, DWORD PTR _hi$[esp-4]
	mov	 eax, DWORD PTR _lo$[esp-4]
	idiv DWORD PTR _divisor$[esp-4]
	mov	 ecx, DWORD PTR _premainder$[esp-4]
	mov	 DWORD PTR [ecx], edx
	ret	 16
?div64@@YGHHHHPAH@Z ENDP				; div64
_TEXT	ENDS