I need to check a string for unwanted characters (only valid HEX characters allowed, 0-9, a-f, A-f)
sub unwantedCHAR()
Dim IPv6_Address As String
IPv6_Address = ThisWorkbook.Names("IPv6_Address").RefersToRange.Value
Dim ipv6_segments() As String
ipv6_segments = Split(IPv6_Address...