Currently Embarcadero offers an exceptional upgrade option for any older version of Delphi, C++Builder and RAD Studio. The discount is up to 45%, valid up to the end of year.
This is a real opportunity if you still use an old Delphi. You will really benefit upgrading your old Delphi 5, 7 or whatever to XE5. I know, I've done it. Almost all my application have been ported to the latest Delphi version.
There are a lot of articles about porting old Delphi code to recent Delphi (Mostly pre-Unicode Delphi to post Unicode Delphi). And if you think you can't do this port yourself, I'm sure you'll find a Delphi expert who will help you. I suggest you look at Embarcadero MVP directory.
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