Text Operations in VBA

Test if string is composed of only letters. Return true if it is.

Function IsLetter(strValue As String) As Boolean

Dim intPos As Integer

For intPos = 1 To Len(strValue)

Select Case Asc(Mid(strValue, intPos, 1))

Case 65 To 90, 97 To 122

IsLetter = True

Case Else

IsLetter = False

Exit For

End Select

Next

End Function