fengcool.com » .net-compact-framework http://www.fengcool.com Just another WordPress weblog Mon, 31 May 2010 02:22:36 +0000 http://wordpress.org/?v=2.8.1 en hourly 1 BackLight Always On http://www.fengcool.com/2007/07/keep-backlight-on-for-your-application-on-windows-mobile-smartphones/ http://www.fengcool.com/2007/07/keep-backlight-on-for-your-application-on-windows-mobile-smartphones/#comments Wed, 25 Jul 2007 21:45:12 +0000 Nelson http://www.fengcool.com/2007/07/keep-backlight-on-for-your-application-on-windows-mobile-smartphones/ WIN32 APIs you needed to call:

[DllImport("coredll.dll")]
private static extern IntPtr SetPowerRequirement(string pvDevice, PowerState DeviceState, int DeviceFlags, IntPtr pvSystemState, int StateFlags);

[DllImportAttribute("coredll.Dll")]
private static extern int ReleasePowerRequirement(IntPtr hPowerReq);

Structure you will need:


public enum PowerState
{
PWRUNSPECIFIED = -1,
FULL = 0,
LOW = 1,
STANDBY = 2,
SLEEP = 3,
OFF = 4,
PWRMAX = 5
}

Actual methods:
IntPtr handle = SetPowerRequirement(”BKL1:”, level, 1, IntPtr.Zero, 0);

Note:
It works on Windows Mobile 5.0 with .net Compact Framework 1.0 or .net Compact Framework 2.0.

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