How to transfer data between two applications?

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There are two applications A and B, I want the data I enter to be transmitted to application B when the button is clicked. Example attached:
Thank you in advance!

Accepted Answer

Jon on 24 May 2022
In appA add an instance of appB as a property (and assign it in the startup function).
In appB assign a property for the data you want to transmit.
In the callback for the button press in appA assign a value to appB's property using your instance of appB = data
Jon on 25 May 2022
I have modified your attached files to provide an example of how you can do what you describe. I commented out some of your code which was not used. You can of course futher modify from here, renaming variables/properties with more meaningful names etc

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