Hi,
thanks for your reply.
> By using the ::add() method....
>
>
>       Fl_Box *b =3D new Fl_Box....
>
>       my_window->add(b);
    what do you mean the parameter 'my_window'??
    I tried this in my callback function, but still not work.
>

Thanks, i am new to FLTK.
So look forward to receiving your assistances.

cheers,
Yang



>
> > >     Fl_Check_Button* flcb =3D3D ((Fl_Check_Button*)w);
> > > if ( flcb->value() =3D3D=3D3D 1 ) {
> > > flcb->labelcolor(FL_RED);
> > > flcb->label("Label&Scale");
> > >                 new Fl_Box(0, 20, 1000, 20, " first ");
> > >                 new Fl_Box(0, 640, 1000, 20, "  second ");
> > >                 new Fl_Box(0, 660, 1000, 20, " third ");
> >=20
> >=20
> > How could I add these three new Box classes to the parent window???
>
>
> By using the ::add() method....
>
>
>       Fl_Box *b =3D new Fl_Box....
>
>       my_window->add(b);
>
>
> This is covered in the docs, so a little reading might bring further
> enlightment.
>
>
>
>
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