I was reading Mastering Delphi 2005 the other day (I'm working my way
through it - from what I understand there arn't any good D2006 books as
yet). Anyway there was a discussion on how initialize and finalize
operate under .Net. Given the very non-object orientatedness of
initialize and finalize it's pretty impressive how the Borland (DevCo)
team were able to get so much of the Delphi functionality into .Net. I
say this not having written a Delphi.net app however.
I've certainly learnt quite a bit from reading it as I've gone from D6/7
-> D2006 (even though I'm less than a third of the way through it).
Alister
Paul A Norman wrote:
Point of interest - something basic for me and possibly others to learn.
I've only ever used unit 'initialization and finalization' "blindly"
since Delphi 3 days for Activex / OLE type stuff, as just someting
that you have to do - without understanding.
initialization
OleInitialize(nil);
finalization
OleUninitialize;
Otherwise I've used the *onFormComplete* and *onDestroy* to set intial
stuff up and then release stuff.
But I am guessing that *Finailization* is a better place to release
stuff (*help avoid memoery leakage under certain circumstances*?), but
*Initialization* would have to be used for *Finalization* to be
acceptable..
I've read the Delphi 2005 help and googled a bit, but am not yet sure
just what sorts of code can be put in the Initialization and Finalization.
1. Can anything declared as a unit *VAR* or *CONST* be dealt with
or used in Initialization ? it appears so to me from what I see
(below).
2. Could I safely .*create* and .*free* objects respectively?
I was reading through a *Unit* the other day and saw all sorts of
things in *Initialization* there that surprised me.
Can any one please point me to a good reference on this, or in our new
learning sharing attitude, explain it for every ones benefit here?
initialization
FillChar(BrowserData,SizeOf(BrowserData),#0);
OleInitialize(nil);
New(PtrWGUID);
New(PtrMGUID);
New(PtrDGUID);
PtrWGUID^:=CGID_WebBrowser;
PtrMGUID^:=CGID_MSHTML;
PtrDGuid:=PGUID(nil);
GetBrowserData(BrowserData);
IEStr:=IEVerStr;
OnMessageCompNo:=0;
finalization
Dispose(PtrWGUID);
Dispose(PtrMGUID);
Dispose(PtrDGUID);
OleUninitialize;
end.
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Alister Christie
Computers for People
Ph: 04 471 1849 Fax: 04 471 1266
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Wellington
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