Finding an item (matching data instead of label)

// FindItemData  - Finds an item whose data matches the passed in lparam value.
// Returns       - Handle to the item or NULL
// lparam        - Data to search for
// bDownDir      - Search direction - TRUE for down
// hItem         - Item to start searching from. NULL for currently selected item

HTREEITEM CTreeCtrlX::FindItemData(DWORD lparam, BOOL bDownDir /*=TRUE*/, HTREEITEM hItem /*=NULL*/)
{
	HTREEITEM htiSel = hItem ? hItem : GetSelectedItem();
	HTREEITEM htiCur = bDownDir ? GetNextItem( htiSel ) :
	GetPrevItem( htiSel );
	if( htiCur == NULL )
	{
		if( bDownDir )
			htiCur = GetRootItem();
		else
			htiCur = GetLastItem( NULL );
	}
	while( htiCur && htiCur != htiSel )
	{
		DWORD sItemData = GetItemData( htiCur );
		if (sItemData == lparam )
			return htiCur;
		htiCur = bDownDir ? GetNextItem( htiCur ) : GetPrevItem( htiCur );
		if( htiCur == NULL )
		{
			if( bDownDir )
				htiCur = GetRootItem();
			else
				htiCur = GetLastItem( NULL );
		}
	}
	return NULL;
}