コマンドが失敗したときに異常終了しましたと表示させたいとき~errorlevel - Qiita
Errorlevel returned as exit code when executing bat step – CloudBees Support
Windows Batch File Tips and Tricks - PushMon - Script, App, Batch & Cron Job Monitoring - Push Monitoring
errorlevel（終了コードを取得する）
Create a batch file that will log the time & date of your internet disconnection or reconnection - VisiHow
Why is SetupAndroid.bat failing with default setup directories? - Mobile - Unreal Engine Forums
cmd - ERRORLEVEL cannot report regsvr32's process exit code, why? - Stack Overflow
How to get the error code (ErrorLevel) from PowerShell into Windows command prompt? - Stack Overflow
Batch File Return Code - Explanation And Example
choice (command) - Wikipedia
Windows Batch File Tips and Tricks - PushMon - Script, App, Batch & Cron Job Monitoring - Push Monitoring
windows - "IF ERRORLEVEL" chain sets wrong value - Stack Overflow
How to Use the Microsoft Batch File Language (with Pictures)
windows - How would I see if a certain Batch File is running and get the PID? - Super User
Batch Cheat Sheet by ChaosJD - Download free from Cheatography - Cheatography.com: Cheat Sheets For Every Occasion
Create a batch file that will log the time & date of your internet disconnection or reconnection - VisiHow
Batch Script - Return code - GeeksforGeeks
Introduction to Command Line & Batch files
Return Error Level
errorlevel（終了コードを取得する）
Batch File to Ping
