关于引用window API的问题

[minj2me]

下面的程序我引用了window API进行关机，重新启动，和注消但只有注消能正常运行。请高手回答一下我的问题。多谢！！！
还有请高手指出程序中不好的地方
EMAIN地址：[e-mail]
.....
[DllImport("user32")]
public static extern long ExitWindowsEx(long uFlags,long dwReserved);
[DllImport("shell32")]
public static extern long ShellAbout(long uFlags,long dwReserved);

........
private void ButReOpen_Click(object sender, System.EventArgs e)
{
sh = ExitWindowsEx(2,dwReserved);
}

private void ButReLogin_Click(object sender, System.EventArgs e)
{
sh = ExitWindowsEx(0,dwReserved);
}

private void ButClose_Click(object sender, System.EventArgs e)
{
sh = ExitWindowsEx(1,dwReserved);
//MessageBox.Show("aaa");
}

private void ButCancel_Click(object sender, System.EventArgs e)
{
this.Close();
}
}
}

[dawndu]

你要调整你进程的权限才可以，在google上搜索一下