Implicit Containing Worksheet Reference
Locates unqualified Worksheet.Range/Cells/Columns/Rows member calls inside worksheet modules, that implicitly refer to the containing sheet component.
Implicit references inside a worksheet document module can easily be mistaken for implicit references to the active worksheet (ActiveSheet), which is the behavior in all other module types. By explicitly qualifying these member calls with 'Me', the ambiguity can be resolved. If the intent is to refer to the active worksheet, qualify with 'ActiveSheet' to prevent a bug.