Parse Data from txt file while its open with another program?

[Sanction]

Is this possible to do and how can I do this with WIN API? I would prefer to use <fstream> but I want to learn the WIN API as well.

Thanks!
Sanction

[Thomas1965]

It depends on the file mode the other programs opens the file.
Try reading with CreateFileA and check the return value.
https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-createfilea