A Question about SDI

[bobbob]

When file open is selected by the user the method,
CMyProgDoc::Serialize(CArchive& ar) is called.

I have in my application a LeftView class which is
derived from CTreeView...

My question is how do I pass the data in to the LeftView
class from the Doc Class?

I mean I could call a method of the LeftView class with the CArchive
as a parameter, but how do I get the instance of the LeftView class
within the Doc Class so that I can call the method?

Where should the data object that was read in from a file be stored
ie.. which class?

TIA
B