This method demonstrates how to populate an image field in a LiveCycle form using FDF Toolkit .net and VB.net.

Private Sub ImageFieldManipulations()
        ' INSERTS IMAGE IN IMAGE FIELD ON LIVECYCLE FORMS
        Dim cFDFApp As New FDFApp_Class()
        Dim cFDFDoc As New FDFDoc_Class()
        cFDFDoc = cFDFApp.FDFCreate
        cFDFDoc.XDPAddForm("subform1", Server.MapPath("test_livecycle-image1.pdf"))
        cFDFDoc.XDPAddField("FullName", "Bo Duke", "subform1", FDFDoc_Class.FieldType.FldTextual)
        cFDFDoc.XDP_Add_ImageField("Image1", "subform1", Server.MapPath("Signature_01_Small.jpg"), True)
        Response.Clear()

        ' WRITE XDP DATA TO BUFFER
        Response.ContentType = cFDFApp.MimeXDP
        Response.BinaryWrite(cFDFDoc.FDFSavetoBuf(FDFDoc_Class.FDFType.XDP, True))

        ' WRITE MERGED XDP/PDF TO BUFFER
        'Response.ContentType = cFDFApp.MimePDF
        'Response.BinaryWrite(cFDFDoc.PDFMergeXDP2Buf(Server.MapPath("test_livecycle-image1.pdf"), False, ""))

        ' WRITE MERGED XDP/PDF TO FILE
        'cFDFDoc.PDFMergeXDP2File(Server.MapPath("test_livecycle-image-MERGED.pdf"), Server.MapPath("test_livecycle-image1.pdf"), False, "")

        Response.End()
    End Sub