Field pointers and tables

[Fawcett, Mitch]

I am trying to use some code from Neil Rhodes book where he obtains a field
pointer from a focus object, no matter whether it is a field or a table that
has the focus.  I'm getting some wierd results when the focus is on a table
and I am thinking it's because my table uses customTableItem to define it's
items.

Here is the sequence leading up the the "Clipboard limit exceeded"
1) I tap on an item in my table; item gets highlighted. 
2) call the function I wrote (borrowed from Rhodes) GetFocusObjectPtr().
Code snippet follows.
3) call FldCopy (pfld) where pfld is the field pointer returned by
GetFocusObjectPtr().
4) "Clipboard limit exceeded"

Question:  How do I get a field pointer to the table item in my case?

static FieldPtr GetFocusObjectPtr (void)
{
   FormPtr              pfrm;
   Word         wFocus;
   FormObjectKind fobjType;

   pfrm = FrmGetActiveForm ();
   wFocus = FrmGetFocus (pfrm);
   if (wFocus == noFocus)
        return (NULL);

   fobjType = FrmGetObjectType (pfrm, wFocus);
   if (fobjType == frmFieldObj)
   {
        return (FrmGetObjectPtr (pfrm, wFocus));
   }
   else if (fobjType == frmTableObj)
   {
        return (TblGetCurrentField (FrmGetObjectPtr (pfrm, wFocus)));
   }
   return NULL;
}