
        Public Shared Sub Init(ProjectName As String)
            RootNode.Text = "取证工程：" & ProjectName '设置根节点
            RootNode.Tag = "ProjectRoot"
            RootNode.ImageIndex = VFDataTreeViewIcons.Project
            RootNode.SelectedImageIndex = VFDataTreeViewIcons.Project
            MaterialNode.Text = "检材" '检材节点
            MaterialNode.Tag = "Material"
            MaterialNode.ImageIndex = VFDataTreeViewIcons.Document
            MaterialNode.SelectedImageIndex = VFDataTreeViewIcons.Document
            DataNode.Text = "数据" '数据节点
            DataNode.Tag = "Data"
            DataNode.ImageIndex = VFDataTreeViewIcons.DriveImage
            DataNode.SelectedImageIndex = VFDataTreeViewIcons.DriveImage
            RootNode.Nodes.Add(MaterialNode)
            RootNode.Nodes.Add(DataNode)
            Main.VFDataExplorerWindow.VFDataTreeView.Nodes.Add(RootNode)
            RefreshMaterialFromList(MainWindow.project.Materials)
        End Sub
What does the VB.NET code mean?