Moves focus to the first visible node.
You can use the following TreeViewControl methods to move the node focus:
|MoveFirstNode||Moves focus to the first visible node.|
|MoveNextPage||Moves focus forward by the number of nodes displayed onscreen.|
|MoveNextNode||Moves focus to the node that follows the one currently focused.|
|MovePrevNode||Moves focus to the node that precedes the one currently focused.|
|MovePrevPage||Moves focus backward by the number of nodes displayed onscreen.|
|MoveLastNode||Moves focus to the last visible node.|
You cannot use these methods to focus hidden nodes or expand collapsed nodes.