identifier. Similarly, when the parser encounters a function whose name it does not recognize, it calls the callback routine to get a function ID number. The ID numbers are stored in the token sequence. Note: it is best to parse strings that contain <EM>
known</EM>
 function names and identifiers.</P>
<P>
The Parser can return the following errors:</P>
<DL>
<DT>
PSEE_BAD_NUMBER</DT><DD>
The string contained a badly-formatted number.</DD>
<DT>
PSEE_BAD_CELL_REFERENCE</DT><DD>
The string contained a badly-for