ENVY/App can initialize the startUp class for an image when an image component loads. You specify the class when creating an image component using the startUpClass: method.
The following code fragment shows how to set a startUp class to, for example, EsWindowSystemStartUp when creating an image component:
"Set the startUp class for startup.ic." | result | (result := ApplicationDumper new) ... startUpClass: EsWindowSystemStartUp; ... dumpIntoFileNamed: 'startup.ic' path: '.' using: ComponentMaps. ...