Blender save option and operator

[rasamohamed]

Hi...

I'm trying to show save option directly while closing the blender only if user have made any changes in Blender.

I'm trying to execute this line

ot->exec = wm_save_mainfile; // from window_operator.c file

in to this operator function

static int wm_exit_blender_op(bContext *C, wmOperator *op)
{
- - - - - ;
}
But I can't. How its possible? or Shall I create a NEW operator like WM_OT_quit_blender(wmOperatorType *ot) what are the steps I have to follow, Is there any link for this?