Here’s my solution. Please feel free to improve the program.
1.Use the chrome;
2.When you run the first time, read QRcode with WhatsApp Web; (only the first time) to register the cell that will send the message;
3.Create a csv file named: phone list
3.Put in the csv file the relation of the numbers to which you want to send the message;
4.Place the cell phone number with the country and city code.
5.Adjust your message;
Main.xaml (18,1 KB)