Windows - How do I disable the "Wrong Volume" error message

Question

My application is reading/writing data to a removable media (USB DOK) in the background. The problem is that when the USB is removed while the app is working, the computer pops up an error message:

Wrong Volume

The wrong volume is in the drive. Please insert volume into drive E:.

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This happens during operations such as GetFileSize, ReadFile. Obviously, since the app is supposed to work in the background, I would like to suppress those messages and fail silently.

BTW - It seems that the process giving those message is not my process, but CSRSS.EXE (although the cause is definitely the operation from my process).

One direction I am considering is switching to NtQueryInformationFile, NtReadFile, etc., but I'd rather not...

Thanks

Answer 1

Try calling:

SetErrorMode(SEM_NOOPENFILEERRORBOX);

At the beginning of your main function.

From the documentation:

The system does not display a message box when it fails to find a file. Instead, the error is returned to the calling process.