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This is a protection for your program, which doesn't break functionality of your program.
procedure TForm1.FormShow(Sender: TObject);
begin
if GlobalFindAtom('THIS_IS_SOME_OBSCURE_TEXT')=0 then
GlobalAddAtom('THIS_IS_SOME_OBSCURE_TEXT')
else
begin
ShowMessage('You may execute this program only once
in this current session. If you want to
run this program again, you should
restart Windows or send letter to us
about it. We'll send key to you.');
Close;
end;
end;
- For more
-
Win32 Programmer's Reference
- Download source
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