extern I8 PopUp(I1 *msg,TssStruct *parent=NULL);
extern U8 LtfPutChar(Ltf *l,I8 ch, U8 sc,BoolU4 old_preempt);
extern void LeftClickLink(Ltf *l,LtfEntry *cl,BoolU4 old_preempt2);
extern void RightClickLink(Ltf *l,LtfEntry *cl,BoolU4 old_preempt2);
extern U8 GetMsg(I8 *param1,I8 *param2,U8 mask=-2,TssStruct *tss=NULL);
extern U8 GetMsgNoWait(I8 *param1,I8 *param2,U8 mask=-2,TssStruct *tss=NULL);
extern void LtfInsert(Ltf *l,LtfEntry *ll);
extern LtfEntry *LtfPutS(Ltf *l,I1 *st);
extern I8 PopUpMenu(Ltf *l,I1 *help=NULL);
extern Ltf *LtfNew();
extern void LtfDel(Ltf *l,BoolU4 root_mem=FALSE);
extern LtfEntry *LtfPrintF(Ltf *l,I1 *src,...);
extern void DrawBorder(BoolU4 solid,I8 l,I8 r,I8 t,I8 b,U1 attr,BoolU4 clip);
extern void EditInsertLtf(Ltf *l,Ltf *b);
extern Ltf *LtfRead(I1 *name,U8 flags=0);
extern BoolU4 View();
extern BoolU4 IsPixelCovered(TssStruct *tss,I8 x,I8 y);
extern void PlotInputPointer();
extern void GrCircle(GrBitMap *base,I8 cx,I8 cy,I8 radius,
  I8 step=1,double start_rad=0,double len_rad=pi2);
extern void GrPlot0(GrBitMap *base,I8 x,I8 y);
extern void ClearAllBpts(Ltf *l);
extern void ToggleBpt(Ltf *l,I8 line_offset=0,U8 flags=SBPTF_BPT);
extern void LtfGo();
extern void LtfStep(Ltf *l);
extern void Lpt1PutChar(U1 ch);
extern void WsFillin(I8 n);
extern void WsMan(I8 n,TssStruct *parent=NULL);
extern void WsTsk();
extern TssStruct *ws_task;
extern void Edit(I1 *filename);