Public Shared Function StrToByteArray(ByVal str As String) As Byte()
 
        Return System.Text.Encoding.Unicode.GetBytes(str)
 
    End Function
 
 
Dim binaryImageData As String = _
  "FFD8FFE000104A46494600010100000100010000FFDB004300010101010101 ...."
Dim abyt() As Byte = StrToByteArray(binaryImageData)
 
 
        Dim ms As New MemoryStream(abyt)
        With Me.PictureBox1
            .Image = Image.FromStream(ms)
            .SizeMode = PictureBoxSizeMode.CenterImage
        End With

System.ArgumentException: Parameter is not valid.
   ...
 
ImageFromStream\Form1.vb:line 44

.Image = Image.FromStream(ms)