If Not pbBild.Image Is Nothing Then
    Dim ms As New IO.MemoryStream
    pbBild.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg)
    Dim bytes() As Byte = ms.ToArray()
    updRow.Item("bild") = bytes
End If

If Not myReader!bild Is System.DBNull.Value Then
    Dim bytes() As Byte
    bytes = myReader!bild
    Dim ms As IO.MemoryStream = New IO.MemoryStream(bytes)
    pbBild.Image = Image.FromStream(ms)
    pbBild.SizeMode = PictureBoxSizeMode.StretchImage
End If

MS Visual Studio 2010 Prof.
MS Windows 7 Ultimate 64-bit
INTEL QuadCore Q6600 @2,40 GHz / 8GB RAM