Storing bitmap into sql

I'm coding an app for printing bills. I have a form within I load data. I want to automate printing, so in that order i save a bmp image of my filled form and then store into a mdf database for late print each row/cell (images in this case). But when i drag my table into a preview form (just for chek if i store data correctly) the id of each row appears, but i can't see that row's image... the question is: what am i doing wrong here? (i watched a lot o tutorials for last 3 days but i can't figure out yet what to do)

Public Sub toBitMap()
  'Define un nuevo bitmap con las dimensiones del form  
  Dim miBitMap As New Bitmap(imprimir.Width, imprimir.Height)
  ' Dibuja la imagen del form en un objetoBitmap
  imprimir.DrawToBitmap(miBitMap, New Rectangle(0, 0, imprimir.Width, imprimir.Height))
  Dim memoryStreamBuffer = New MemoryStream()
  miBitMap.Save(memoryStreamBuffer, ImageFormat.Bmp)
  Dim data As Byte() = memoryStreamBuffer.GetBuffer()
  Dim saveImage As imagenesTableAdapter = New imagenesTableAdapter
  Dim a As String = saveImage.insertImagen(data)
  If multiple.iteraciones <= 0 Then
    cantidad = saveImage.ScalarQuery()
  End If
End Sub