Source files that will be used for online documents are created in an identical manner to those used for help text. When the IPFC command is invoked to compile the source files, the /INF parameter should be specified, as follows:
IPFC SOURCE.IPF /X /W3 /INF >ERRORS.TXT
The IPF compiler will then include the necessary hooks to enable VIEW.EXE to display the online document. Note that online documents compiled with the /INF parameter have a default extension of .INF, rather than the normal extension of .HLP for help libraries.