' Validate a US Social Security Number' Example:' MessageBox.Show(IsValidUsSSN("123-12-1234")) ' True' MessageBox.Show(IsValidUsSSN("123-123-1234")) ' FalseFunction IsValidUsSSN(ByVal ssn As String) As Boolean Return System.Text.RegularExpressions.Regex.IsMatch(ssn, _ "^d{3}-d{2}-d{4}$")End Function