VB.net / Excell application Manipulation

I am trying to write code that will open two Excel workbooks and paste one file to the "Master" file as a new sheet in VB.net.
Along with this request, I would like some help in trying to find a good resource for the microsoft object model.  What I have found so far is 100 ways to do one thing.  I would like to find something that is streamlined.

The code I have so far is:

            Dim oExcel, wbk, wbk2 As Object
            oExcel = CreateObject("Excel.Application")

            Dim oMain, w2 As Excel.Workbook
            Dim oSheet As Excel.Sheets
            Dim MMrpt As String = Me.Rpt
            Dim MMpath As String = Me.Path

            'Try
            Connection.Open()
            Dim gCommand As SqlClient.SqlCommand = New SqlClient.SqlCommand(sql, Connection)
            Dim ReportInfo As SqlClient.SqlDataReader = gCommand.ExecuteReader
            While ReportInfo.Read
                Me.Rpt = ReportInfo(0).ToString
                Me.Initialize()
                Me.SetParameters()
                Me.ExportType()
                wbk = oExcel.Workbooks.Open(Filename:=MMpath, UpdateLinks:=False, ReadOnly:=False)
                wbk2 = oExcel.Workbooks.Open(Filename:=Me.Path, UpdateLinks:=False, ReadOnly:=False)

This is where the problem is so far:   ****************************

                wbk.sheets.add(wbk2.activesheet)  
                wbk.save()
                wbk.close()
                wbk2.save()
                wbk2.close()
*******************************************************

            End While
            Connection.Close()
            Me.Rpt = MMrpt
            Me.Path = MMpath