HELP in DIGITAL SIGNATURE

Here is my VB.NET Code :

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim gbStop As Boolean 'local variables Dim jso As Object Dim nCount As Integer ' get JavaScript Object ' note jso is related to PDDoc of a PDF, jso = gPdDoc.GetJSObject ' count nCount = 0 gbStop = False ' search for the text If Not jso Is Nothing Then ' info gApp = CreateObject("acroexch.app") gPdDoc = CreateObject("acroexch.pddoc") If gPdDoc.Open("c://NoJavaScrip.pdf") Then jso = gPdDoc.GetJSObject() jso.SetUserPassword("'13434141022'") 'jso.ShowMyMessage("SetUserDigitalIDPath") jso.SetUserDigitalIDPath("'c://GuangWenZhao.pfx'") jso.app.execMenuItem("ADBESDK:AddSignature") jso.AddSignature(jso) gApp.Show() End If End If End Sub

It made The PDF File Like This:

But I Hope The PDF File Like This:

What can I do For This Result?

Thank you !

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