AcceptLabelsInFormulas Property
True if labels can be used in worksheet formulas. The default value is True. Read/write Boolean.
expression.AcceptLabelsInFormula
expression Required. An expression that returns one of the objects in the Applies To list.
Example
This example sets the AcceptLabelsInFormulas property for the active workbook and then sets cells B1:D1 on worksheet one to be column labels.
ActiveWorkbook.AcceptLabelsInFormulas = True
Worksheets(1).Range("b1:d1").FormulaLabel = xlColumnLabels