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Tip of the Day
Language: VB7
Expertise: Intermediate
Mar 31, 2003

IsValidUsZip - Validating a US ZIP code

' Validate a US ZIP code
' Example:
'   MessageBox.Show(IsValidUsZip("12345"))       ' => True
'   MessageBox.Show(IsValidUsZip("12345-1234"))  ' => True
'   MessageBox.Show(IsValidUsZip("12345-12345")) ' => False

Function IsValidUsZip(ByVal zip As String) As Boolean
    Return System.Text.RegularExpressions.Regex.IsMatch(zip, _
        "^(\d{5}-\d{4})|(\d{5})$")
End Function
Marco Bellinaso
 
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