Expanding a branch

// ExpandBranch - Expands a branch completely
// hti          - Handle of the tree item to expand
void CTreeCtrlX::ExpandBranch( HTREEITEM hti )
{
        if( ItemHasChildren( hti ) ){
                Expand( hti, TVE_EXPAND );
                hti = GetChildItem( hti );
                do{
                        ExpandBranch( hti );
                }while( (hti = GetNextSiblingItem( hti )) != NULL );
        }
        EnsureVisible( GetSelectedItem() );
}