[VB.NET]我设置了关机,但怎样才能取消关机啊!!!

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我设置了关机,但怎样才能取消关机啊!!!
我设置了关机,但怎样才能取消关机啊??????
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我是用VB.NET设置了定时关机了,,但是我想取消另设置一个,
怎样才能取消上次的关机呢?????
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怎麼設定的就怎麼取消....
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如: Shell( shutdown.exe /s /f /t 30 )
30秒之后就会关机了!!!
还有没有办法挽救啊!!!!
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shutdown -a
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楼上正解
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