PRODUCT  :  TURBO C                                NUMBER  :  452
  VERSION  :  2.O
       OS  :  PC-DOS
     DATE  :  FEBRUARY 2, 1989                         PAGE  :  1/2

    TITLE  :  ERASING CHARACTERS (OR "TEXT")




  The  following  program  demonstrates  two  methods  of  removing
  previously displayed characters.    The first method uses the bar
  function to erase  the  desired  area  of the screen.  The second
  method involves overwriting the font  in  the  current background
  color.  Both methods  are  effective,  and  the choice of methods
  would be based on the needs of the particular application.


  #include <graphics.h>
  #include <dos.h>

  main()
  {
    int driver = DETECT;        /* autodetect driver          */
    int mode;
    int oldcolor;
    int x=10;
    int y=10;
    char string1[] = "Hello";
    char string2[] = "world";  char string3[] = "Goodbye";

    initgraph(&driver, &mode, "");

    outtextxy(x, y, string1);   /* print a string             */
    sleep(1);                   /* wait a second              */

    /*** erase text by drawing a bar ***/
    setfillstyle(SOLID_FILL, getbkcolor());
    bar(x, y, x+textwidth(string1), y+textheight(string1));

    outtextxy(x, y, string2);   /* print another string       */
    sleep(1);                   /* wait another second        */

    /*** erase the string by overwriting ***/
    oldcolor = getcolor();      /* save current color         */
    setcolor( getbkcolor() );   /* set to background color    */
    outtextxy(x, y, string2);   /* erase string               */
    setcolor(oldcolor);         /* restore color              */

    outtextxy(x, y, string3);   /* print one more string      */
    sleep(1);                   /* wait one more second       */

    closegraph();
    return 0;
  }











  PRODUCT  :  TURBO C                                NUMBER  :  452
  VERSION  :  2.O
       OS  :  PC-DOS
     DATE  :  FEBRUARY 2, 1989                         PAGE  :  2/2

    TITLE  :  ERASING CHARACTERS (OR "TEXT")




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  subject to the terms  of  the  No-Nonsense License Statement that
  you received with  the  Borland product to which this information
  pertains.