Assuming your using Win98 what would have happened is that mfc42 has been replaced by another version during a program installation. I can recall a time back in the days of Win95 when I had seven different versions of this file stored in programs root folders because each one needed a different version. You will need to find a way to reinstall Kodak to put the version of mfc42 it requires back. I can't remeber now if there is a way. But if you do this you will probably find that the program that caused it to be replaced will stop working. So copy it somewhere else first. When something complains copy into that apps root folder.
Hopefully someone will know how ro reinstall Kodak.