send messages one by one

I don’t want it to get mixed up when I send messages over and over, where should I look in the arduino code to change this?

There is no arduino code, what is the issue you are having?

Hi,
Sorry, I said that because I usually only code for Arduino boards. For my question, I mean the C++ code. When a message is sent to the queue, where can I find it in the code? I want to find it so I can see it is a string then understand where my problem is. Do you know where this would be?
Thankyou!