whats new ¦  programming tips ¦  indy articles ¦  intraweb articles ¦  informations ¦  links ¦  interviews
 misc ¦  tutorials ¦  Add&Win Game

Tips (1548)

Database (90)
Files (137)
Forms (107)
Graphic (116)
IDE (21)
Indy (5)
Internet / LAN (131)
IntraWeb (0)
Math (76)
Misc (127)
Multimedia (45)
Objects/
ActiveX (51)

OpenTools API (3)
Printing (35)
Strings (83)
System (268)
VCL (243)

Top15

Tips sort by
component


Search Tip

Add new Tip

Add&Win Game

Advertising

16 Visitors Online


 
...detect a keypress during a loop?
Autor: Thomas Stutz
[ Print tip ]  

Tip Rating (6):  
     


procedure TForm1.Button1Click(Sender: TObject);
var
  
LoopAborted: Boolean;
  i: Integer;
begin
  
LoopAborted := False;
  i := 0;
  repeat
    
// Your Code...
    
Caption := IntToStr(i);
    Application.ProcessMessages;

    if GetKeyState(VK_Escape) and 128 = 128 then
    begin
      
LoopAborted := True;
      Break;
    end;

    Inc(i);
  until i = 100000;
  if LoopAborted then
    
ShowMessage('User has aborted the loop!');
end;


 

Rate this tip:

poor
very good


Copyright © by SwissDelphiCenter.ch
All trademarks are the sole property of their respective owners