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int   GetDeviceCaps(  
   
          HDC   hdc, //  
device-context   handle    
          int   nIndex   //   index  
of   capability   to   query      
        );  
    LOGPIXELSX
Number   of   pixels   per   logical   inch   along   the   screen  
width.  
  LOGPIXELSY Number   of   pixels   per   logical   inch  
along   the   screen   height. 
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procedure TForm1.Button2Click(Sender: TObject);
var
   I, J, X, Y: Word;
begin
   I := 0;
   J := 0;
   while I < 64000 do
   begin
     Randomize;
   & ......

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