Vector<Value> GetAllData(Ctrl *parent) throw (ValidationException) 
{
   Vector<Value> data;

   for (Ctrl *c = parent->GetFirstChild(); c; c->GetNext()) {
      if (c->GetFirstChild())
          data.Append(GetAllData(c));
      else {
          Value v = c->GetData();
          if (v.IsError())
              throw ValidationException(c);
          else if (!v.IsVoid) // Prevents empty values
              data.Add(v);
      }
   }
   return data;
}