Combine from excel macro

I have written an excel macro that prints several excel pages.

I print them using pdfcreator.

Now, I would like to "Combine all" from the excel macro and save the resulting pdf.

I would expect this to be possible with just a few COM commands.

I looked at all the examples, especcially the "combinejobs.vbs" script, tried a lot of things, but I can not get it to work.

Which lines do I have to include in the excle macro to get it to combine the pages and save it?