http://metamod.org/sdk/dox/structenginefuncs__s.html
i have this same exact file, I found no pfnSequenceGet anywhere... whats my problem? the date has been modified since i edited the file from:
#endif EIFACE_H
to
#endif // EIFACE_H
putting in those comment lines, got rid of the error (extra tokens after endif statement) when compiling.