Command Table Format Reference
Beginning with Visual Studio 2008 SDK, use XML Command Table (.vsct) files instead of command table configuration (.ctc) files to define how menus and commands appear in your VSPackages. For more information, see XML-Based Command Table Configuration (.vsct) Files.
A Visual Studio Command Table (.ctc) file is a text file that defines the command elements — such as menu items, menus, toolbars, and combo boxes — that a VSPackage provides to the IDE.
A .ctc file has five major sections. Each section is marked with beginning and ending identifiers. Following are the command table format sections: