Assuming you really just want to do what you ask...I don't see the need to tie this into the same programmatic interface, since you're effectively hacking through to a solution anyway. Decouple it from your infrastructure and just use another process script to do the excel open/close. Here is another link to an answer for how to do this, that should guide you: Open, save and close an Excel file from the command prompt without interaction

you could of course call it from this process, or set a scheduler/timer to activate it, and so on. Given the lack of other details, this should answer your question asked.