void DragPieceBegin P((int x, int y));
void DragPieceEnd P((int x, int y));
void LeftClick P((ClickType c, int x, int y));
+int RightClick P((ClickType c, int x, int y, int *col, int *row));
int StartChildProcess P((char *cmdLine, char *dir, ProcRef *pr));
void DestroyChildProcess P((ProcRef pr, int/*boolean*/ signal));