[DotNetDevelopment] Request.Params in Master Pages

[BigJ]

I have the following code in my master page

    void Page_Load()
    {
        String UserId = Page.Request.Params.Get("UserId");
        UseLbll.Text = UserId;
    }

Simple enough, i'm trying to set the text property of a label to the
UserId value that I grab from the URL.  I also tried hardcoding the
UserId in the Page_Load function...which didn't work either.  I'm
beginning to think Page_Load is the wrong function to be using if it's
the master page?  Anyone have any insight...thanks.