StandbyPreventHost.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;

namespace StandByPreventor
{
    class Program
    {
        static void Main(string[] args)
        {
            

            var length = args.Length;
            Process process = null;
            switch (length)
            {
                case 0:
                    Console.WriteLine("Not Specified...");
                    Console.WriteLine("Press any key to exit");

                    Console.ReadKey();
                    break;
                case 1:
                    process = Process.Start(new ProcessStartInfo(args[0]));
                    break;
                default:

                    if (length > 2)
                    {
                        var argments = new StringBuilder();
                        for (int i = 1; i < args.Length; i++)
                        {
                            argments.Append(args[i]);
                            argments.Append(' ');
                            process = Process.Start(new ProcessStartInfo(args[0], argments.ToString()));
                        }
                    }
                    else
                    {

                        process = Process.Start(new ProcessStartInfo(args[0], args[1]));
                    }
                    break;
            }
            if (process == null)
                return;

            SetThreadExecutionState(ExecutionState.SystemRequired | ExecutionState.Continuous);
            process.WaitForExit();
        }

        [DllImport("kernel32.dll")]
        extern static ExecutionState SetThreadExecutionState(ExecutionState esFlags);

    }

    [FlagsAttribute]
    public enum ExecutionState : uint
    {
        // 関数が失敗した時の戻り値
        Null = 0,
        // スタンバイを抑止
        SystemRequired = 1,
        // 画面OFFを抑止
        DisplayRequired = 2,
        // 効果を永続させる。ほかオプションと併用する。
        Continuous = 0x80000000,
    }

}