Merge PDF files created by Foxit from Excel

I could find some macros for merging PDF files using VBA while Acrobat is the used application.
Due to financial reasons, our company decided to use Foxit Phantom instead of Acrobat.
The Foxit Phantom 1.0 Type Library is available in the VBA Tools - Reference.
But I have no idea how to set the pdf files in VBA using this libray.
Has anyone worked on a program trying to merge pdf files created by Foxit?
Please assist.
Thanks

I guess you can look at their manuals. I did not see a merge function in their ActiveX documentation SDK file.
https://www.foxitsoftware.com/support/sdkdocs.php

There are other 3rd party programs that can merge the files most likely.

Thanks. I'll do so.