MainForm.TreeView_DragOver C# (CSharp) Method

	void TreeView_DragOver (object sender, DragEventArgs e)
	{
		// Retrieve the client coordinates of the mouse position.
		Point targetPoint = _treeView.PointToClient (new Point (e.X, e.Y));

		// Retrieve the node at the mouse position
		TreeNode targetNode = _treeView.GetNodeAt (targetPoint);

		// Select the node at the mouse position
		_treeView.SelectedNode = targetNode;

		if (_treeView.SelectedNode.Text == "Node4")
			e.Effect = DragDropEffects.Copy;
		else
			e.Effect = e.AllowedEffect;
	}