Excel Help

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Can I Add A Sequential Number To A Spreadsheet Each Time It Is Opened?

Machan meka mata Team Viewer connect wela karala denna puluwanda code ekakth thiyenawa

Sub AUTO_OPEN()

Range("A1") = Format(Range("A65536"), "YYYYMMDD") & Format(Right(Range("A1"), 3) + 1, "000")

End Sub