int get_service_description(const TCHAR *, SC_HANDLE, unsigned long, TCHAR *);\r
int get_service_startup(const TCHAR *, SC_HANDLE, const QUERY_SERVICE_CONFIG *, unsigned long *);\r
int get_service_username(const TCHAR *, const QUERY_SERVICE_CONFIG *, TCHAR **, size_t *);\r
-int set_service_environment(nssm_service_t *);\r
-int unset_service_environment(nssm_service_t *);\r
+void set_service_environment(nssm_service_t *);\r
+void unset_service_environment(nssm_service_t *);\r
int pre_install_service(int, TCHAR **);\r
int pre_remove_service(int, TCHAR **);\r
int pre_edit_service(int, TCHAR **);\r