Hook Management

GB.Hook Registers a hook function.
GB_HOOK_ERROR Error hook identifier.
GB_HOOK_LANG Language hook identifier.
GB_HOOK_LOOP event loop hook identifier.
GB_HOOK_MAIN Main hook identifier.
GB_HOOK_POST Post hook identifier.
GB_HOOK_QUIT Quit hook identifier.
GB_HOOK_TIMER Timer hook identifier.
GB_HOOK_WAIT Wait hook identifier.
GB_HOOK_WATCH Watch hook identifier.