Listing 3: Die Größenänderung anpassen.

struct Gadget *gb_MainLayout;
WINDOW_ParentGroup,   gb_MainLayout = (struct Gadget *)
                  IIntuition->NewObject(ILayout->LAYOUT_GetClass(),NULL,
  LAYOUT_Orientation, LAYOUT_ORIENT_VERT,
  LAYOUT_SpaceOuter,  TRUE,
  LAYOUT_SpaceInner,  TRUE,
  LAYOUT_AddChild,    gb_ButtonGad,
  TAG_DONE),
  TAG_DONE)))