Finding dynamcally added control

Hi,
In Page_Load of my page I call two functions.
In first function I do this:
  DropDownList ddl = new DropDownList();
  ddl.ID = "something";
  mycontainer.Controls.Add(ddl);
Now in my second function I want to add listitems to ddl.
How can I find ddl so I can add listitems, I tried using Page.FindControl() with no success.