Encodes the barcode in the Postnet symbology. Returns the encoded image as a byte array.
[Visual Basic] Public Function Postnet( _ ByVal Barcode As String, _ ByVal ShowText As Boolean, _ ByVal CheckChar As Boolean, _ ByVal CheckCharText As Boolean, _ ByVal ImageFormat As String, _ ByVal Resolution As Integer, _ ByVal Rotate As Integer, _ ByVal PostnetTall As String, _ ByVal PostnetShort As String, _ ByVal PostnetSpacing As String _ ) As Byte()