Most probable candidate for copying to $FVWM_USERDIR. Here are defined start, quit and restart function (sessionless and session-managed) which are internally recognized by FVWM during certain important actions. InitFunction or SessionInitFunction is the place to put all user wants to be executed during NsCDE startup. In system-wide default configuration there are already conditionally defined some probable applications and there are hints and examples for user to customize this further.