Upgrading From Delphi 3 - Advice required

[zoltarboi]

HI,

I have tried to search for tips on upgrading from Delphi 3 in this forum, but could not find anything.

Can anyone help with the following:

I am new to Delphi, and have been given the task of migrating 2 systems, both running on Delphi 3, to a supported version. I have done something similar with Powerbuilder, but hit an issue with direct migrating from one version to another.

Is it possible to go from D3 to either Delphi 2006 or Delphi 2007, or do I need to migrate to an intermediate level first and then to the final version.

Any help would be much appreciated.

 

[DelphiAaron]

as with any delphi upgrade, things change.

opening a d3 app in d2007, shouldnt be a problem.
if your d3 app has any 3rd party components you will have to find newer versions, migrate them across (if you have the source) or find alternatives.

Aaron

 

[zoltarboi]

Thanks aaronjme,

I had hoped it would be straightforward.

I do know we have a VCL called TEncrpyt so I'll need to follow up on that.

Appreciate the response

 

[Glenn9999]

It's not a direct transition. As you can well know, many things will change between what compiled in Delphi 3 and the upgraded versions. Much will work, but a lot won't, too, so test thoroughly. Mostly, though, you will find a number of new features related to the source.

You will find a number of compiler errors, and a few odd functionality changes. For example, you can simply assign a new value to Position of a trackbar without problems in Delphi 3. In newer versions, this triggers the OnChange event, which is something generally not wanted. As a result, you'll have to do something like this:

TrackBar1.OnChange := nil;
Trackbar1.Position := MediaPlayer1.Position;
TrackBar1.OnChange := TrackBar1Change;

HTH some.

----------
Measurement is not management.

 

[zoltarboi]

Thanks Glenn9999,

I am a great advocate of "Test, Test and RE-Test", so this is top of the agenda.

Appreciate the warning - looks like I'll be fixing and re-compiling