Text field and font attributes

Hello everybody,

My UI object has a text field, the class is initialized in the main() routine as
    jbox_initclass(c, JBOX_TEXTFIELD);

Yet I really don't want the three default text attributes to appear in the inspector! How can I achieve this? I thought that if I didn't use the JBOX_FONTATTR flag, they would not appear, but it's not the case.

Thanks a lot,
Daniele