Finally solved this one: it turns out that the item in focus might be a text
field, or it might also be a table field. If its a table, you just need to get
the current item of the table, like so:
UInt16 foc = FrmGetFocus(FrmGetActiveForm());
if(foc != noFocus)
{
FormPtr form = FrmGetActiveForm();
if (FrmGetObjectType(form, foc) == frmTableObj)
field = TblGetCurrentField(FrmGetObjectPtr(form, foc));
else if (FrmGetObjectType(form, foc) == frmFieldObj)
field = FrmGetObjectPtr(form, foc);
else
field = NULL;
}
else field = NULL;
...which will set 'field' to be the currently active text field, or NULL if the
focus isn't on a text field.
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