The methods in this class simplify the browsing and display of the OPC server's address space. The OPC server is browsed and the branches are displayed in a Forms TreeView control. The items of the selected branch are displayed in a Forms ListView control. Node images are displayed as shown in the picture. The user can select other images or supply his own ImageList. The whole hierarchical tree structure is browsed and displayed. In default mode, the server is browsed as needed, initially the root level and each branch when it is selected for the first time. This results in a short latency, even for servers with a large address space. The BrowseTreeList object's BowseModeOneLevel property can be set to false, to force browsing all levels in the first call. The TreeNode Tag property contains the tlNodeInfo object. This contains the full path name of the branch and the ListViewItem array with all item in this branch. The ListViewItem Tag property contains the fully qualified Item ID. The methods isItem() and isBranch() can be used to determine the node type.

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