You could check for a number first before doing anything...


Code
-------------------
Private Sub Worksheet_Calculate()

Dim Inrange As Range
Dim rng As Range
Set Inrange = Range("B16,B58,T4,T15,T23,T50")
For Each rng In Inrange.Cells

If Not IsNumeric(rng.Value) Then
If rng.Value = "c" Then
rng.Font.Name = "Wingdings 3"
Else
rng.Font.Name = "Webdings"
End If
End If

Next rng

End Su
-------------------

Throw an Else in there if you want to do something if the value is
number.



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