Get previous item in outline

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In the previous section, we defined an overloaded version of GetNextItem()
which returns the next item in the outline as if the outline were completely
expanded. We now define its counterpart: GetPrevItem(). This function uses
the GetLastItem() defined in an earlier section.

 

// GetNextItem  – Get previous item
as if outline was completely expanded

// Returns             
– The item immediately above the reference item

// hItem               
– The reference item

HTREEITEM CTreeCtrlX::GetPrevItem( HTREEITEM hItem )

{

        HTREEITEM      
hti;



        hti = GetPrevSiblingItem(hItem);

        if( hti == NULL )

               
hti = GetParentItem(hItem);

        else

               
hti = GetLastItem(hti);

        return hti;

}