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[null,"*","워크시트 중 특정한 부분에 값이 변경(입력)되면","블로그","https://withseok.tistory.com/"]
[null,null,"스스로 작동하는 매크로를 단계적으로 만들어 본다.","유튜브","https://bit.ly/위드석"]
[]
[null,"*","1단계 매크로 작동할 범위를 확인한다."]
[]
[null,"*","2단계 숫자만 입력하도록 작성한다."]
[null,null,"숫자가 아닌 경우에는 메세지박스를 띄우고 삭제한다."]
[null,null,"예상치 못한 에러 상황에 대비한 문구를 삽입한다."]

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[null,null,null,null,null,null,null,null,"여기는"]
[null,null,null,null,null,null,null,null,"문자 입력 가능"]