使用C#编写的一个定时关机程序

/// Exits windows (and tries to enable any required access rights, if necesarry).

/// </summary>

/// <param name="how">One of the RestartOptions values that specifies how to exit windows.</param>

/// <param name="force">True if the exit has to be forced, false otherwise.</param>

/// <remarks>This method cannot hibernate or suspend the system.</remarks>

/// <exception cref="PrivilegeException">There was an error while requesting a required privilege.</exception>

protected static void ExitWindows(int how , bool force ) {

EnableToken("SeShutdownPrivilege");

if (force )

how = how | EWX_FORCE;

if (ExitWindowsEx(how, 0) == 0)

throw new PrivilegeException(FormatError(Marshal.GetLastWin32Error()));

}

/// <summary>

/// Tries to enable the specified privilege.