header-magic is a Windows DLL injector + API hooker that is used to extend some Windows SNES ROM hacking tools to support headerless ROMs.

Unlike a trivial batch script that simply adds a header, runs a tool, and then removes a header; header-magic actually intercepts every file size, read and write command, to make the program think a header is actually there. Changes made by the programs to the files are immediate, and can be used with other programs directly.

It is also written in a completely program-agnostic fashion, such that it can extend any Windows application …