extern UI_GADGET_LISTBOX * ui_add_gadget_listbox( UI_WINDOW * wnd, short x, short y, short w, short h, short numitems, char * list, int text_width );
extern void ui_mega_process();
extern void ui_get_button_size( char * text, int * width, int * height );
extern UI_GADGET_SCROLLBAR * ui_add_gadget_scrollbar( UI_WINDOW * wnd, short x, short y, short w, short h, int start, int stop, int position, int window_size );
extern void ui_scrollbar_do( UI_GADGET_SCROLLBAR * scrollbar, int keypress );