在wince里面保存屏幕亮度的值保存在注册表HKEY_CURRENT_USER\ControlPanel\\Backlight\Brightness里面，值的范围是0-100,所以要改变屏幕的亮度，只要改变这个值，然后重新加载就行代码如下:

/// <summary>/// 调节屏幕的亮度/// </summary>public class SetBackLight{public static void SetBright(string strValue){SetBackLightValue(strValue);ReloadBackLight();}public static int GetBacklightValue(){RegistryKey CUser = Registry.CurrentUser;RegistryKey Backlight = CUser.OpenSubKey("ControlPanel\\Backlight", true);return (int)Backlight.GetValue("Brightness", RegistryValueKind.DWord);}public static void SetBackLightValue(string strValue){try{

            RegistryKey hkcu = Registry.CurrentUser;RegistryKey Backlight = hkcu.OpenSubKey("ControlPanel\\Backlight", true);Backlight.SetValue("Brightness", strValue, RegistryValueKind.DWord);}catch (Exception ex){System.Diagnostics.Debug.WriteLine(ex.Message);}}public static bool ReloadBackLight(){bool ret = false;IntPtr scanEvent = NativeWin.CreateEvent(IntPtr.Zero, false, false, "BackLightChangeEvent");if (scanEvent == null){throw new Exception("CreateEvent失败");}else{NativeWin.EventModify(scanEvent, EventFlags.SET);NativeWin.CloseHandle(scanEvent);ret = true;}return ret;}partial class NativeWin{[DllImport("coredll.dll", SetLastError = true, CharSet = CharSet.Auto)]internal static extern IntPtr CreateEvent(IntPtr lpEventAttributes, [In, MarshalAs(UnmanagedType.Bool)] bool bManualReset, [In, MarshalAs(UnmanagedType.Bool)] bool bIntialState, [In, MarshalAs(UnmanagedType.BStr)] string lpName);[DllImport("coredll.dll", SetLastError = true, CharSet = CharSet.Auto)][return: MarshalAs(UnmanagedType.Bool)]internal static extern bool CloseHandle(IntPtr hObject);[DllImport("coredll.dll", SetLastError = true)][return: MarshalAs(UnmanagedType.Bool)]internal static extern bool EventModify(IntPtr hEvent, [In, MarshalAs(UnmanagedType.U4)] EventFlags dEvent);}enum EventFlags : int{PULSE = 1,RESET = 2,SET = 3}}</pre>