-- FileIO External Factory. 9feb93 JT
FileIO
ISS    mNew, mode, fileNameOrType  --Creates a new instance of the XObject
X      mDispose                --Disposes of XObject instance.
II     mWriteChar, charNum     --Writes a single character. Returns error code
IS     mWriteString, string    --Writes out a string of chars. Returns error code
I      mReadChar       --Returns a single character
S      mReadWord       --Returns the next word of an input file
S      mReadLine       --Returns the next line of an input file
S      mReadFile       --Returns the remainder of the file
SSS    mReadToken, breakString, skipString
I      mGetPosition    --Returns the file position
II     mSetPosition, newPos    --Sets the file position. Returns error code
I      mGetLength      --Returns the number of chars in the file
ISS    mSetFinderInfo, typeString, creatorString
S      mGetFinderInfo  --Gets the finder info
S      mFileName       --Returns the name of the file
I      mDelete         --Delete the file and dispose of me
I      mStatus         --Returns result code of the last file io activity
SI     +mError, errorCode  --Returns error message string
V      mReadPICT           --Return handle to Metafile
S      mNativeFileName     --Returns the native (dos) name of the file
II     +mSetOverrideDrive, driveLetter --Set override drive letter ('A' - 'Z') to use
       when loading linked castmembers.  Use 0x00 to clear override.