window mobile 過一段時間就會自動休眠，下面的代碼可以禁止機器自動休眠。

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代碼 [DllImport("CoreDll.dll")]
????????private?static?extern?void?SystemIdleTimerReset();

????????private?static?int?nDisableSleepCalls?=?0;
????????private?static?System.Threading.Timer?preventSleepTimer?=?null;

????????private?static?void?PokeDeviceToKeepAwake(object?extra)
????????{
????????????try
????????????{
????????????????SystemIdleTimerReset();
????????????}
????????????catch?(Exception?e)
????????????{
????????????????//?TODO
????????????}
????????}


????????///?<summary>
????????///?禁止設備自動關閉電源
????????///?</summary>
????????public?static?void?DisableDeviceSleep()
????????{
????????????nDisableSleepCalls++;
????????????if?(nDisableSleepCalls?==?1)
????????????{
????????????????//?沒隔30秒刷新一次計時器
????????????????preventSleepTimer?=?new?System.Threading.Timer(new?System.Threading.TimerCallback

??????????????(PokeDeviceToKeepAwake),
????????????????null,?0,?10?*?1000);
????????????}
????????}

????????///?<summary>
????????///?允許設備自動關閉電源
????????///?</summary>
????????public?static?void?EnableDeviceSleep(){
????????????nDisableSleepCalls--;
????????????if?(nDisableSleepCalls?==?0){
????????????????if?(preventSleepTimer?!=?null){
????????????????????preventSleepTimer.Dispose();
????????????????????preventSleepTimer?=?null;
????????????????}
????????????}
????????}

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