Private Sub Worksheet_SelectionChange(ByVal Target As Range) Dim selectedCell As Range Dim checkRange As Range Dim cell As Range Dim duplicateCells As Range Dim isDuplicate As Boolean Range("A5:AI142").Interior.ColorIndex = xlNone ' 기본 색상 (하얀색) If Target.Cells.Count = 1 Then If Not Target = "" Then ' 선택된 셀 확인 Set selectedCell = Intersect(Target, Range("A5:AI142")) ' 선택한 셀의 범위 확인 If selectedCell ..