static struct ntk_window * get_window (struct ntk *ntk, int id);
static int insert_window (struct ntk *ntk, struct ntk_window *win);
static void interp_deleted (ClientData cdata, Tcl_Interp *interp);
int ntk_create_event_handler (TCL_OBJ_CMD_ARGS);
int ntk_create_sys_window (TCL_OBJ_CMD_ARGS);
int ntk_destroy_sys_window (TCL_OBJ_CMD_ARGS);
void ntk_dispatch_buttonpress (struct ntk_window *win, int button, int x, int y);
void ntk_dispatch_buttonrelease (struct ntk_window *win, int button, int x, int y);
void ntk_dispatch_configure (struct ntk_window *win, int x, int y, int width, int height);
void ntk_dispatch_keypress (struct ntk_window *win, Tcl_Obj *s, Tcl_Obj *symobj, Tcl_Obj *keycode);
void ntk_dispatch_motion (struct ntk_window *win, int x, int y);
int ntk_do_event (TCL_OBJ_CMD_ARGS);
int ntk_get_clipboard_data (TCL_OBJ_CMD_ARGS);
int ntk_get_total_windows (TCL_OBJ_CMD_ARGS);
int Ntk_Init (Tcl_Interp *interp);
int ntk_main_loop (TCL_OBJ_CMD_ARGS);
int ntk_map_sys_window (TCL_OBJ_CMD_ARGS);
int ntk_move_sys_window (TCL_OBJ_CMD_ARGS);
int ntk_put_image (TCL_OBJ_CMD_ARGS);
int ntk_resize_sys_window (TCL_OBJ_CMD_ARGS);
int ntk_set_clipboard_data (TCL_OBJ_CMD_ARGS);
int ntk_set_focus (TCL_OBJ_CMD_ARGS);
int ntk_set_title (TCL_OBJ_CMD_ARGS);
int ntk_unmap_sys_window (TCL_OBJ_CMD_ARGS);
static void remove_window (struct ntk *ntk, int id);