OleViewDotNet.COMRegistryViewer.contextMenuStrip_Opening C# (CSharp) Method

        private void contextMenuStrip_Opening(object sender, CancelEventArgs e)
        {
            TreeNode node = treeComRegistry.SelectedNode;

            if ((node != null) && (node.Tag != null))
            {
                contextMenuStrip.Items.Clear();
                contextMenuStrip.Items.Add(copyGUIDToolStripMenuItem);
                contextMenuStrip.Items.Add(copyGUIDHexStringToolStripMenuItem);
                contextMenuStrip.Items.Add(copyGUIDCStructureToolStripMenuItem);
                if ((node.Tag is COMCLSIDEntry) || (node.Tag is COMProgIDEntry))
                {
                    contextMenuStrip.Items.Add(copyObjectTagToolStripMenuItem);
                    contextMenuStrip.Items.Add(createInstanceToolStripMenuItem);
                    contextMenuStrip.Items.Add(refreshInterfacesToolStripMenuItem);
                    COMProgIDEntry progid = node.Tag as COMProgIDEntry;
                    COMCLSIDEntry clsid = node.Tag as COMCLSIDEntry;

                    if (progid != null)
                    {
                        clsid = m_reg.MapClsidToEntry(progid.Clsid);
                    }

                    if (clsid != null && m_reg.Typelibs.ContainsKey(clsid.TypeLib))
                    {
                        contextMenuStrip.Items.Add(viewTypeLibraryToolStripMenuItem);
                    }
                }

                if (node.Tag is COMTypeLibVersionEntry)
                {
                    contextMenuStrip.Items.Add(viewTypeLibraryToolStripMenuItem);
                }
                if (PropertiesControl.SupportsProperties(node.Tag))
                {
                    contextMenuStrip.Items.Add(propertiesToolStripMenuItem);
                }
            }
            else
            {
                e.Cancel = true;
            }
        }