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The FSP_FSCTL_QUERY_WINFSP code provides a simple method to determine if
the file system backing a file is a WinFsp file system. To use issue a
DeviceIoControl(Handle, FSP_FSCTL_QUERY_WINFSP, 0, 0, 0, 0, &Bytes, 0)
If the return value is TRUE this is a WinFsp file system.