horizontal_copy_area(screen, firstchar, nchars, amount) TScreen *screen; int firstchar;		 int nchars; int amount;
horizontal_copy_area( TScreen *screen, int firstchar,		 int nchars, int amount)
horizontal_copy_area(screen, firstchar, nchars, amount)    TScreen *screen;    int firstchar;		/* char pos on screen to start copying at */    int nchars;    int amount;			/* number of characters to move right */{    int src_x = CurCursorX(screen, screen->cur_row, firstchar);    int src_y = CursorY(screen, screen->cur_row);    copy_area(screen, src_x, src_y,	      (unsigned)nchars * CurFontWidth(screen,screen->cur_row),	      FontHeight(screen),	      src_x + amount*CurFontWidth(screen,screen->cur_row), src_y);}