🚀 go-pugleaf

> I am having problems detecting whether a cursor key is pressed or certain
> capital letters within TP 7.0.
> 
> For example, the UP arrow on the keyboard is ASCII code 0 72, 'H' is ASCII
> code 72.
> 
> Is it possible to detect the difference between these keys in Pascal? If so,
> how??

   Yes, and your code is no doubt omitting the process of the 
Extended/Special keys (and their scan codes).  The situation you're 
seeing is due to "H" and the scan code for UpArrow being the same value.  
Here's what you must do:

Var C1 : char;
...
  C1 := UpCase(ReadKey);
  case C1 of
   #00 : begin  { Extended/Special keystroke }
           case ReadKey of  { process the scan code }
            #72 : do_UpArrow;
            etc.
            else
           end  { case }
          end;
    #72 : do_H;
    etc.
   else
   end