リファレンス、WshShell オブジェクト、AppActivate メソッド
まんま
set WshShell = WScript.CreateObject("WScript.Shell") WshShell.Run "calc" WScript.Sleep 100 WshShell.AppActivate "Calculator" WScript.Sleep 100 WshShell.SendKeys "1{+}" WScript.Sleep 500 WshShell.SendKeys "2" WScript.Sleep 500 WshShell.SendKeys "~" WScript.Sleep 500 WshShell.SendKeys "*3" WScript.Sleep 500 WshShell.SendKeys "~" WScript.Sleep 2500