DWORD WINAPI GetSFXPos(void);
Position of the beginning of the archive relative to the beginning of file.
GetSFXPos function is called right after the successful archive recognition by the IsArchive function. MultiArc selects the FMT-module which returned the least value (closer to the beginning of the file). This fixes the issue when, for example, there's an ARJ archive placed without compression inside the ZIP archive with the name, say, "N3gk8v1t.106". Previous versions of MultiArc would show the contents of the ARJ archive instead of the ZIP one.