B4J Question sending a message / file / image to a specified number using whatsapp API

[new_danoptic]

Would you please write a function to send a message / file / image to a specified number using whatsapp API?
I want to send messages from my desktop.
Thank you

 

[peacemaker]

I'm sure that no one modern messenger allows an automated "spam" messages.
Max is to open the dialog window with the contact.

Or maybe some paid API for business partners.