BOOL LOADDS PASCAL SLFLineToAddr ( HSF hsf, WORD line, LPADDR lpaddr,
                                   SHOFF FAR * lpcbLn)

    NEW:    Given a filename <hsf> and a line number <line>, return the
            address of the start of the line <lpaddr> and the number of
            bytes of code for the line <lpcbLn>.  Routine return TRUE for
            sucess, and FALSE for failure.

    CALLS:  SHHexeFromHmod()
----

BOOL LOADDS PASCAL SLFQueryModSrc ( HMOD hmod )

    NEW:    Determine is a given module <hmod> contains symbolic information.
            Returns TRUE if it does, and FALSE if not.

----

HMOD LOADDS PASCAL SLHmodFromHsf ( HEXE hexe, HSF hsf )

    NEW:    Given a source file <hsf>, return an HMOD indicating which module
            it was compiled into.  <hexe> shows which EXE to look in or if
            NULL checks all EXE's. 

            It's possible for a source file to be used in more than one module
            (e.g. a C++ header file with inline functions, or a C header file
            with a static function).  In this case the function will only
            find the first one.

    CALLES: SHGetNextMod() SHGetNextExe()


----

HSF LOADDS PASCAL SLHsfFromFile< ( HMOD hmod, LSZ  lszFile )

    NEW:    Given a module <hmod> and a source filename <lszFile>, return a
            handle to the source file.  Returns NULL if file not found.  Only
            the filename and extension are matched, paths are ignored.

----

HSF LOADDS PASCAL SLHsfFromPcxt ( PCXT pcxt )

    NEW:    Given an pointer to a CXT <pcxt>, return a handle to the source
            file if one exists, or NULL if not found.

    CALLS:  SHHMODFrompCXT() SHpADDRFrompCXT()
----

BOOL LOADDS PASCAL SLLineFromAddr ( LPADDR lpaddr, LPW lpwLine,
                                    SHOFF FAR * lpcb, SHOFF FAR * lpdb)

    NEW:    Given an address <lpaddr>, return line number and associated
            info for that line.  <lpwLine> is the line number for this line.
            <lpcb> is the number of bytes of code that were generated for this
            line.  <lpdb> is the delta offset for the start of the line.  
            Return TRUE is source was, FALSE if not.

    CALLS:  SHSetCxtMod() SHHexeFromHmod(), SHHMODFrompCXT()
----

LPCH LOADDS PASCAL SLNameFromHmod ( HMOD hmod, WORD iFile )

    NEW:    Given an HMOD <hmod> and a file number <iFile>, return a
            length-prefixed pointer to the filename.  NOTE: filenames
            are not in any special order and you may receive duplicates.
            Filename may not be null terminated.
----
 
LPCH LOADDS PASCAL SLNameFromHsf ( HSF hsf )

    NEW:    Given a source file handle <hsf>, return a Length-prefixed
            pointer to the filename.  NOTE: May not be null-terminated.
----