@echo off
SETLOCAL
if X"%~1" == X"/install" goto install

set file=%~f1
powershell -Command "$x=(Get-ItemProperty -LiteralPath $env:file).LastWriteTime ; $x ; pause ; Set-ItemProperty -LiteralPath $env:file -Name LastWriteTime -Value $x"
goto end

:install
echo install
set file=%~f0
set base=HKEY_CURRENT_USER\SOFTWARE\Classes\*\shell
reg add %base% /f
reg add %base%\retouch_timestamp /f /d "タイムスタンプ書き戻し"
reg add %base%\retouch_timestamp\command /d "\"%file%\" \"^%%1\""

:end