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Possible Duplicates:
How to also prepare for 64-bits when migrating to Delphi 2010 and Unicode
How should I prepare my 32-bit Delphi programs for an eventual 64-bit compiler?

I would like to know the approach for migrating from 32 bit [Delphi 7] to 64 bit. What all things i should remember and what all steps i should follow?

What all complexity i might face?

please provide me step by step migration process. What things i should address first?

There are 2 possibilities 1. Using yet to launch Delphi 64 bit version 2. Updating existing code and functionality to use 64 bit OS features

Community
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Dev
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  • This question might sound stupid but still Why everybody is worried about 64 bit OS and 64 bit Delphi Compiler? I am very keen to know all the possible issues. – Dev Jun 10 '11 at 06:26
  • just to be clear, your option 2 is not possible because you would need 64 bit compiler! – David Heffernan Jun 10 '11 at 07:29

2 Answers2

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There is no 64-Bit Delphi-Compiler at this time. So you can not do it now, you have to wait until the next Delphi-Version. For the next Delphi a 64-Bit compiler is announced. You can not "use" 64-Bit-OS-Features (What are they? What do you mean exactly?) with 32-Bit compiler. A 32-Bit-application will allways run in the WOW3264-Emulator (on a 64-Bit Windows, of course).

Andreas
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    Nevertheless, this question provides a pretty detailed view of things you can do NOW: http://stackoverflow.com/questions/4051603/how-should-i-prepare-my-32-bit-delphi-programs-for-an-eventual-64-bit-compiler – Warren P Jun 10 '11 at 13:38
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What all complexity i might face?

As stated by Andreas, there's no yet 64-bit Delphi compiler ATM. You can use FPC for now, and regarding the complexities, Lazarus/FPC wiki has addressed them.

LeleDumbo
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