[置顶] C# WINCE调节屏幕亮度
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
}
}