Send Whatsapp Message

Method 1: send message via Whatsapp app (Requires the user to have WhatsApp installed on the computer and logged in.)
Recipient
Message
Method 2: use WhatsApp API (Note: phone number must include country code using "+")
Sender
API Key

This program is to send whatsapp message.

Reference:
WhatsApp Business API 收費：2025 年最新收費模式

Author: fireyu, email address: fireyu@gmail.com