รบกวนสอบถามการ print ไฟล์ image ผ่านเครื่องพิมพ์แบบ bluetooth คะ

        Dim fStream As New IO.FileStream("D://qr-code-vb-net.gif", IO.FileMode.Open, IO.FileAccess.Read)
        Dim br As New IO.BinaryReader(fStream)
        Dim data As String = br.ReadInt32() + br.ReadInt32()
        'Dim byteArray = br.ReadBytes(CInt(fStream.Length))
        br.Close()
        fStream.Close()


        Dim SP As System.IO.Ports.SerialPort
        SP = New System.IO.Ports.SerialPort("COM5")
        SP.WriteTimeout = 500
        SP.ReadTimeout = 500
        'SP.Write(data, 0, 856)
        SP.WriteLine("12321423423")
        SP.WriteLine("PRINT")
        SP.Close()