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
   }
}

int Test(int hi, int lo, int divisor)
{
   int remainder;
   return div64(hi, lo, divisor, &remainder);
}

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

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

PUBLIC	?Test@@YGHHHH@Z					; Test
_TEXT	SEGMENT
_remainder$ = -8					; size = 4
$T70693 = -4						; size = 4
_hi$ = 8					     	; size = 4
_lo$ = 12					    	; size = 4
_divisor$ = 16						; size = 4
?Test@@YGHHHH@Z PROC				; Test, COMDAT
	sub	 esp, 8
	lea	 eax, DWORD PTR _remainder$[esp+8]
	mov	 DWORD PTR $T70693[esp+8], eax
	mov	 edx, DWORD PTR _hi$[esp+4]
	mov	 eax, DWORD PTR _lo$[esp+4]
	idiv DWORD PTR _divisor$[esp+4]
	mov	 ecx, DWORD PTR $T70693[esp+8]
	mov	 DWORD PTR [ecx], edx
	add	 esp, 8
	ret  12
?Test@@YGHHHH@Z ENDP					; Test
_TEXT	ENDS