System Console Dashboard examples?

I don't have any examples to hand, but the idea is to create a monitor and register a callback on it. You can then set the value of the property from the callback.

Exactly what you set depends on what type of widget it is, on a label you'd set its text property, on a LED you would set its color (sorry about the misspelling), on a dial you'd set its value.

You need a way to pass the ID of the widget into the calback, the easiest way to do this is to have the callback proc take arguments, and pass the ID in when registering the callback.