Access FormView from code-behind?

I have a page with a FormView on it (that's it for now).  I'd like to be able to access the FormView in the onPageLoad subroutine, in order to set the SelectedValue of the FormView to the cross-page id of the row that I'm currently editing.  I can get the id ok (so my cross-page posting is working).  When I try to access the FormView in my subroutine it says that it is not declared.  What am I doing wrong?
 
Thanks 
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