RE: Page_PreInit never fires on Masterpage's codebehind

Page_Load fires but Page_Preinit routine never fires.
simply need to run Page_PreInit block in MasterPage's codebehind.
isnt it possible ?
(thanks much for any informative knowledges)
 
    protected void Page_PreInit(object sender, EventArgs e)
    {
        Response.Request("This routine never fires if it is Masterpage's codebehind albeit Page_Load can.So why ?")
    }
...