send messages to whatsapp from vb net app

Hello Experts,
I there a way to send messages to WhatsApp from my vb net app?
Regards
RGuillermoProject ManagerAsked:
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Shaun VermaakTechnical SpecialistCommented:
To a group or individual?
RGuillermoProject ManagerAuthor Commented:
Indivuduals
Shaun VermaakTechnical SpecialistCommented:
Then you will probably need a 3rd party Whatsapp relay
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KimputerCommented:
Whatsapp is a closed propietary system. If they don't want you to send it (without leveraging an existing browser session, which kinda of beats your .net app), you have no way to send any.
I suggest you use the more open (check the BOT API) of Telegram. https://core.telegram.org/bots
It's still not what you exactly want (you don't control Telegram as a normal user, but use the BOT function to get a similar result), but it's still a good solution nonetheless (I receive all my server alerts by PUSH Telegram messages), with mere 20 lines of code.
RGuillermoProject ManagerAuthor Commented:
ok testing BOT API

on the other hand ... third party app like which ?
KimputerCommented:
No third party needed. Whatsapp actually already has an API for you.
Except, they never mention any prices online. So you should just sign up and get the pricing (supposedly still free, but its intention is of course to have a per message billing). If you don't like it, stop the enrollment, if you like it, continue, and start using the API:

https://www.whatsapp.com/business/
https://developers.facebook.com/docs/whatsapp/api/reference

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RGuillermoProject ManagerAuthor Commented:
Thanks to all experts !!
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