' Validate a US phone number' Example:' MessageBox.Show(IsValidUsPhoneNumber("(123) 456-7890")) ' True' MessageBox.Show(IsValidUsPhoneNumber("(123) 456-78901")) ' FalseFunction IsValidUsPhoneNumber(ByVal phnNum As String) As Boolean Return System.Text.RegularExpressions.Regex.IsMatch(phnNum, _ "^(((d{3}) ?)|(d{3}-))?d{3}-d{4}$")End Function
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