adding one or more document files to a new document using vb.net

[ananth3125]

here in the below coding a paragraph is added to new document created with vb.net coding, but i need to merge a document file in the newly created document, kindly guide me the coding...........

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
 
        Dim oMissing As Object = System.Reflection.Missing.Value
        Dim oEndOfDoc As Object = "\endofdoc"
        ' \endofdoc is a predefined bookmark 

        'Start Word and create a new document.
        Dim oWord As Word._Application
        Dim oDoc As Word._Document
        oWord = New Word.Application()
        oWord.Visible = True
        oDoc = oWord.Documents.Add(oMissing, oMissing, oMissing, oMissing)
 
        'Insert a paragraph at the beginning of the document.
        Dim oPara1 As Word.Paragraph
        oPara1 = oDoc.Content.Paragraphs.Add(oMissing)
        oPara1.Range.Text = "Heading 1"
        oPara1.Range.Font.Bold = 1
        oPara1.Format.SpaceAfter = 24
        '24 pt spacing after paragraph.        oPara1.Range.InsertParagraphAfter()