NAME
        PackStructureTags -- pack a structure with values from taglist. (V39)

   SYNOPSIS
        num = PackStructureTags(pack,packTable,tagList);
        D0                      A0   A1        A2

        ULONG PackStructureTags(APTR,ULONG *,struct tagitem *);

   FUNCTION
        For each table entry, a findtagitem() will be done and if the
        matching tag is found in the taglist, the data field will be
        packed into the given structure based on the packtable
        definition.

   INPUTS
        pack - a pointer to the data area to fill in.
        packTable - a pointer to the packing information table.
                    See <utility/pack.h> for definition and macros.
        tagList - a pointer to the taglist to pack into the structure

   RESULTS
        num - the number of tag items packed

   SEE ALSO
        <utility/pack.h>, findtagitem(), unpackstructuretags()