How to control windows-ce 5.0 backlight?

Is there a way to control to a windows-ce 5.0 tablet devic开发者_如何学Goe (DAP CE8800) backlight (dim/bright) programatically using C#?

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There is no standard OS-defined mechanism for backlight operation (intensity or active/inactive). Those devices that do have programmatic control (and not all do) use proprietary APIs. Sometimes it's a driver call, sometimes a developer API, and sometimes it's more esoteric (like a CPL call).

I'm not readily seeing any sort of SDK download on the OEM's product page, so your best bet is going to be to contact them directly and ask.

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It turns out DAP does support backlight control on this tablet. I was able to get it to work by adding DapServiceCS.dll and this code:

DsLightSensor lightSensor = new DsLightSensor();
if (DapServices.DS_EXECUTION_OK ==
    DapServices.DapService(DapServicesCode.DS_GET_LIGHT_SENSOR, lightSensor))
{
    lightSensor.dwIntensity = hScrollBarIntensity.Value;
    DapServices.DapService(DapServicesCode.DS_SET_LIGHT_SENSOR, lightSensor);
}