Title: How to detect a keypress during a loop
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;