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Call this method to get the position value for the element at the head of the tree.
POSITION GetHeadPosition( ) const throw( );
Return Value
Returns the position value for the element at the head of the tree.
Remarks
The value returned by GetHeadPosition can be used with methods such as CRBTree::GetKeyAt or CRBTree::GetNext to traverse the tree and retrieve values.
Requirements
Header: atlcoll.h