I am making a program which use for hiding the file.

I wanna the program and the file hide securely enough. I got an idea from some cellphone software that whenever the program starts, it will show a calculator. The MainWindow of the program only show while the user input the right password in the calculator.

Whereas, as we know different windows version has different UI of calculator. If I rewrite a brand new UI for all version of windows, it is a huge work.

So I have an idea that open the default calculator of windows, keep watch on its keypress. If the keypress equal the password, then kill the process of calculator and show the MainWindow of my program.

Now the question is how can I get keypress from the default calculator of windows? Thank you.

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