;increment variable at 0x7FFFFF and return its original value. E.G, ++x;

   mov eax, [0x7FFFFF]
   inc [0x7FFFFF]
   ret

 ;increment variable at 0x7FFFFF and return the new value. E.G, x++

   inc [0x7FFFFF]
   mov eax, [0x7FFFFF]
   ret