IsValidPhoneField – Check whether a phone number is valid

' Validate attributes of Phone data' Returns True if valid, False if invalid'' Also returns the phone in formatted fashion (USA format).' Will convert alphabetics to numeric''Example:'   If IsValidPhoneField(Value:="3034414444", ReformattedPhone:=strNewPhone,'  '       IsRequired:=True, IsUSAPhone:=True) then ...Function IsValidPhoneField(ByVal Caption As String, Value As Variant, _    ReformattedPhone As String, Optional ByVal IsRequired As Boolean = True, _    Optional ByVal IsUSAPhone As Boolean = True) As Boolean    Dim intNbrDigits As Integer    Dim strTemp As String    Dim blnHasExtension As Boolean    Dim strExtension As String    Dim i As Integer    On Error GoTo ErrorHandler        IsValidPhoneField = True    Value = Trim$(Value)    If Value = "" Then        If IsRequired Then            IsValidPhoneField = False        Else            Exit Function        End If    End If    If Len(Value) > 25 Then        IsValidPhoneField = False    End If    If IsUSAPhone Then        intNbrDigits = 0        strTemp = ""        blnHasExtension = False        'Extract the extension if there is one.        If Len(Value) <= 7 Then            For i = 1 To Len(Value)                If UCase$(Mid(Value, i, 1)) <> "X" Then                    strTemp = Trim(strTemp) + Mid(Value, i, 1)                End If            Next            If Len(strTemp) = 7 Then                strTemp = ""            Else                blnHasExtension = True                strExtension = Trim(strTemp)                strTemp = ""                Value = ""            End If        End If        For i = Len(Value) To 1 Step -1            If UCase$(Mid(Value, i, 2)) = " X" Then                blnHasExtension = True                strExtension = Mid(Value, i + 2, Len(Value) - (i + 1))                Value = Mid(Value, 1, i - 1)                Exit For            End If        Next        'Change alphabetics to numbers ex. 1-94Perot        For i = 1 To Len(Value)            Select Case UCase$(Mid(Value, i, 1))                Case "A" To "C"                    strTemp = Trim(strTemp) + "2"                Case "D" To "F"                    strTemp = Trim(strTemp) + "3"                Case "G" To "I"                    strTemp = Trim(strTemp) + "4"                Case "J" To "L"                    strTemp = Trim(strTemp) + "5"                Case "M" To "O"                    strTemp = Trim(strTemp) + "6"                Case "P" To "S"                    strTemp = Trim(strTemp) + "7"                Case "T" To "V"                    strTemp = Trim(strTemp) + "8"                Case "W" To "Y"                    strTemp = Trim(strTemp) + "9"                Case "0" To "9"                    strTemp = Trim(strTemp) + Mid(Value, i, 1)             End Select        Next        Value = strTemp        intNbrDigits = Len(Value)        ' Format 123-4567        If intNbrDigits = 7 Then            Value = Mid(strTemp, 1, 1) + Mid(strTemp, 2, 1) + Mid(strTemp, 3, _                1) + "-" + Mid(strTemp, 4, 1) + Mid(strTemp, 5, _                1) + Mid(strTemp, 6, 1) + Mid(strTemp, 7, 1)        End If        ' Format 1-234-567-8901        If intNbrDigits = 11 Then            Value = Mid(strTemp, 1, 1) + "-" + Mid(strTemp, 2, 1) + Mid(strTemp, _                3, 1) + Mid(strTemp, 4, 1) + "-" + Mid(strTemp, 5, _                1) + Mid(strTemp, 6, 1) + Mid(strTemp, 7, _                1) + "-" + Mid(strTemp, 8, 1) + Mid(strTemp, 9, _                1) + Mid(strTemp, 10, 1) + Mid(strTemp, 11, 1)        End If        ' Format 123-456-7890        If intNbrDigits = 10 Then            Value = Mid(strTemp, 1, 1) + Mid(strTemp, 2, 1) + Mid(strTemp, 3, _                1) + "-" + Mid(strTemp, 4, 1) + Mid(strTemp, 5, _                1) + Mid(strTemp, 6, 1) + "-" + Mid(strTemp, 7, _                1) + Mid(strTemp, 8, 1) + Mid(strTemp, 9, 1) + Mid(strTemp, 10, _                1)        End If        ' Append extension        If blnHasExtension Then            Value = Trim(Value) + " x" + Trim(strExtension)        End If        Value = Trim(Value)        If intNbrDigits = 0 Or intNbrDigits = 7 Or intNbrDigits = 10 Or _            intNbrDigits = 11 Then        'do nothing        Else            IsValidPhoneField = False        End If    End If    ReformattedPhone = ValueExitMe:    Exit FunctionErrorHandler:    Err.Raise Err.Number, "IsValidPhoneField", Err.DescriptionEnd Function'###########################################################'#'#   This rountime has been brought to you by '#   Pragmatic Software Co. Inc, the creators of Defect Tracker, '#   the tool of choice for tracking functional specifications, '#   test cases and software bugs.'#   Learn more at http://www.DefectTracker.com.'#   Affiliate program also available at '#   http://www.PragmaticSW.com/AffiliateSignup.'#'###########################################################

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