Plug-in Callbacks

Callback | Description
XSILoadPlugin | When Softimage starts, it looks in certain folders, such as the Application\Plugins folders in the User location and in workgroups, for plug-ins that implement XSILoadPlugin. When Softimage finds a self-installing plug-in, Softimage loads the plug-in and calls its XSILoadPlugin function. XSILoadPlugin registers plug-in items (such as commands, menus, and properties) and sets plug-in properties (such as the version number and the location of the help file).
XSIUnloadPlugin | Fired when Softimage unloads the plug-in.

Autodesk Softimage v7.5