Windows mobile error log

To get your app to start, first we need to define "On".

There is "On soft reset": Here there are a couple choices. By far the easiest is to just put a shrtcut in the \Windows\Startup folder.

There is "On resume from sleep." This is a bit more complicated because you have to run something before that happens. The simplest mechanism here is to register your app with CeRunAppAtEvent with the NOTIFICATION_EVENT_WAKEUP event. You'll have to P/Invoke it, as there is no built-in managed method for it.

Edit: There is also "After hard reset". Some OEMs provide a mechanism to run an app or do some form of logic from a cold boot (Symbol for example). You'll have to check with the device OEM's docs for how this would work.

WM_COPYDATA, sockets, memory-mapped files and point-to-point message queues are all IPC mechanisms for CE (well named events are also available). I tend to lean toward point-to-point queues or memory-mapped files. Which one depends on the nature of the data I want to share.