From Xojo Documentation
| This event is only available on the Windows platform.
For cross-platform compatibility, use ＃If...＃Endif with the Target... specifiers to make sure you will not attempt to use this event on an incompatible platform.
Occurs when the user selects Continue from the Service Control Manager on Windows, assuming that a Pause event has already occurred.
The Resume event is not called unless the ServiceApplication is paused. Use this event to continue running your ServiceApplication.