The content of appdesigner TextArea can not be changed

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he he
he he 2023-10-19
回答： he he 2023-10-19
I have created an appdesigner application to comunicate with serial device. However, I find the content of Textarea can not be changed. The following code in the red rectangele is the code, I am conviced that the code have been reached, but it can not work.

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he he
he he 2023-10-19
This is the application. I think i have find the problem. When I input "clear" and the enter key, I have to click the applicaiton, then it works. So there is another question: How to make the input of "clear" and enter work immidiately.

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R2021a

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