hooking up old windows GDI print solution to insert a pdf the dynamic pdf way.

I am attempting to use Dynamic PDF to merge a pdf into a existing windows GDI style print engine. We have a language we developed to do this. The program outputs to the selected printer. I need to know if you have any way to insert a pdf into that stream. I was using PDFtron and we are moving towards your solution, but  I need to retrofit our old code with yours so we can get beyond dot net 3.5. (our pdftron version is pretty old). the document I am trying to merge into as already been generated as a printer type document. I just need to insert the pdf into the stream:
pdfDocument = new PDFDoc(pdfsDirectory + myFileName);
        int dougsPageCount = pdfDocument.GetPageCount();//GENERAL.PDFPAGECOUNT
        AddDictionaryItem("GENERAL", "PDFPAGECOUNT", dougsPageCount.ToString());
        pageitr = pdfDocument.GetPageIterator();
        pdfdraw = new PDFDraw();
        pdfdraw.SetRasterizerType(PDFRasterizer.Type.e_GDIPlus);
the old routine would then add in any additional pages that might be in the PDF.
the new code that works great in our pdf only version looks like this:
                                ceTe.DynamicPDF.Merger.MergeDocument in_doc = new ceTe.DynamicPDF.Merger.MergeDocument(myFileName);

                                AddDictionaryItem("GENERAL", "PDFPAGECOUNT", in_doc.Pages.ToString());
                                //  this is the new way. need to merge this into the oldway...
                                foreach (ceTe.DynamicPDF.Page pg in in_doc.Pages)
                                        ceTe.DynamicPDF.PageList.Add(pg);

Which part of your solution can I use to write out to the existing stream of GDI commands?

Hi,

We currently don't expose a way to write to an existing GDI stream, but this is functionality we could easily add to our DynamicPDF Rasterizer product. Please send an email to our support team at support@dynamicpdf.com so we can coordinate adding this feature and getting you a build to test.

Thanks,
ceTe Software Support Team