[DUG] Delphi 7 to Delphi 2009

[John Bird]

So what sorts of things were no problem, and what sorts of things were a 
problem?

If I think of what sorts of things are in my code, there is quite a lot to 
do with getting the character code of string[i], lots of use of 
length(string),  relying on alphabetic sorting of stringlists,  calling 
ansipos to find the position of a substring within a string,  code such as 
if   string[i] > #32.  and  crlf:=#13#10.    From what I have read most of 
this stuff should be fine.

Please tell us the sorts of danger areas to look out for!

>From my days in another language whcih was portable across Windows and Unix 
I got used to isolating anything to do with OS variances - for instance 
defining CRLF as a constant ( #13#10 in Windows and #10) in Unix etc.  I am 
still trying to keep that in the somewhat remote chance that a linux/OSX 
version of Delphi might magically appear some day.

Its a good idea to have an idea of which type of code are portable across 
ANSI and UNICODE strings as well...

John

I have converted 2 programs over.  If you have updated all your 3rd party 
components, and you don't do anything funny with strings then it is quite 
straight forward.  If you do anything strange with strings, it can be a pain 
in the arse.

One program took about 2 hours to convert, the other took about 20.

Sean