DecimalSeparator Property

expression.DecimalSeparator

expression    Required. An expression that returns an Application object.

Example

This example places "1,234,567.89" in cell A1 then changes the system separators to dashes for the decimals and thousands separators.

Sub ChangeSystemSeparators()

    Range("A1").Formula = "1,234,567.89"
    MsgBox "The system separators will now change."

    ' Define separators and apply.
    Application.DecimalSeparator = "-"
    Application.ThousandsSeparator = "-"
    Application.UseSystemSeparators = False

End Sub