How to save shapes/images from word doc to a file *.JPEG/BMP? and how to get text in one section/page in word doc?

i have done with this code for save shapes/images from word doc to file JPEG/BMP, but it's fail

THE CODES:
wrdDoc = New Word.Document
        wrdApp = New Word.Application

        Try
            wrdApp.Visible = True
            wrdDoc = wrdApp.Documents.Open("")
            wrdDoc.Activate()
        Catch ex As Exception
            MessageBox.Show(ex.ToString)
        Finally
            'wrdDoc.Close()
        End Try

For sh = 1 To wrdDoc.Shapes.Count
                If wrdDoc.Shapes.Item(sh).Type = Microsoft.Office.Core.MsoShapeType.msoAutoShape Then
                    MessageBox.Show(wrdDoc.Shapes.Item(sh).Name)
                    Dim mstream As System.IO.MemoryStream = New System.IO.MemoryStream
                    Dim bitmap As System.Drawing.Bitmap
                    wrdDoc.InlineShapes.Item(sh).Range.CopyAsPicture()
                    bitmap = wrdDoc.InlineShapes.Item(sh).Range.Paste
                    bitmap.Save(mstream, System.Drawing.Imaging.ImageFormat.Bmp)

                    Dim mbr As System.IO.BinaryReader = New System.IO.BinaryReader(mstream)
                    Dim buffer(mstream.Length) As Byte
                    mbr.Read(buffer, 0, CInt(mstream.Length))
                End If
            Next