🚀 go-pugleaf

I have been posting a lot of stupid questions lately
as I have been programming only for 2 1/2 weeks. 
So here is probably another one.

I am using fgets for the user to enter some numbers.
It works fine except if a person holds down the ESC 
key (trying to make it screw up) it will scroll my whole
graphics screen off the screen.  How do you keep it
from doing that?     I am using DOS VGA <graphics.h>
and Borland C++ 3.1. Thanks for any help!!

PS   I hope this isn't another one of those silly questions
I ask.  They don't seem so silly when I ask them,
but when you wizards answer them I would like to
crawl under the table.  That's whats so great about this
internet no one knows me........right.

**********HERE IS THE ROUTINE***************

if (position==6)
    { settextjustify( CENTER_TEXT, CENTER_TEXT );
    x=147,y=350;
    gprintf(&x,&y,"Enter new");
    gprintf(&x,&y,"Balance position of point");
    gotoxy(18,25);
    fflush(stdin);   //flush it, just in case something else is in it
    fgets (s,10,stdin); //get string, only 9 characters(from the stdin)
    fflush(stdin);
                            //if s(the string) is a number, convert 
    if ( f=atof (s) )   //it to a floating point and store it in f.
       {balanceofpoint=f;    
       setfillstyle (1, BLUE);
       bar (300,403, 355,413);
       settextjustify( RIGHT_TEXT, CENTER_TEXT );
       x=355,y=408;
       gprintf(&x,&y,"%.3f",balanceofpoint);
       setfillstyle (1, BLUE);
       bar (25,325, 270,425); }
   else
      {setfillstyle (1, BLUE);
      bar (25,325, 270,425); }}
   }