Thank you for your tips, Argun. There is no helpful documentation that comes with my cheap printer. So it's all on my own. I doubt that my contacting them will get anywhere. I thought that printing out a word or two could be a simple task, but I guess not. Although the printer comes with software, I just wanted to see how far I could go with Core Bluetooth.

Yeah... That came upon me while I was at sleep.

Yes. That works. Thanks a million.

Thanks, DTS Engineer. Unfortunately, that's worse than using NSWindowDelegate with AppDelegate. My sample macOS application never receives a call with scenePhase when a window closes.

Actually, I'm not so sure that it's the escaped apostrophe that causes an SQLite error. I assumed so without realizing that the printed text in the console box is not what SQLite sees. Anyway, I'm going to bed. Thanks for pointing that out.

Oh, I see what you mean. If I try to use an SQL command with a string quoted with apostrophes in order to insert initial values to an SQLite database file, SQLite seems to see escaped apostrophes rather than apostrophes as SQLite gives me an error.

I need to quote each value with either an apostrophe or a double quotation mark, not an escaped one.

Thank you for your tip, DTS Engineer. I guess, you've given me a clue. The background color doesn't change because it has no button style. I've added .buttonStyle(.plain) below the clipShape line. And it now has a background color. Thank you.

I realize that my question is confusing since I've posted irrelevant lines of code for a contextual menu. I'm sorry about that.

I've placed 'tableRowAction()' inside tableViewSelectionDidChange(_:), and it works. Thanks a lot.

I've created a very simpler sample project. The ContentView guy doesn't received a call back. 😢

Thank you, DTS Engineer. That's exactly what I have been trying to do. That @escaping part is what I was not able to figure out. Anyway, I've implemented it with no errors. Unfortunately, the ContentView guy doesn't receive a tableRowAction callBack. I'll make a sample project with a simpler version and give it a try.

Yes. The simultaneous guy does it. There is a question of where the Text View should be placed, though.

Several years ago, I had a macOS application and an iOS app that goes with the former. The iOS app was accepted into the store. They've rejected our macOS application, saying there already existed a similar product. We simply accepted a defeat and moved on. Who cares about how much money we have lost?

Thank you, eskimo. I think I understand your point.