BCB3 to BCB6

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2 total messages Started by Mike Heneghan Fri, 18 Mar 2005 17:57

#84

Author: Mike Heneghan
Date: Fri, 18 Mar 2005 17:57

7 lines
1668 bytes

Hi, I developed a program with BCB3 educational version. I purchased BCB6 non-educational version so I can distribute the software. 
When I build and run the program I get run time errors. 
When a button is pressed in a visible form, a new form is dynamically created and a run time error occures at this point. I have used trace to follow the problem. When the button is pushed the code jumps to the constructor for the new form. Then it jumps to some Borland inline functions and them back to the new form, but not to the constructor. All of the code in the constructor is skipped and the program jumps to the FormCreate method. Since variables are not initialized in the constructor, death occurs in FormCreate when those variables are used. 
Any thoughts on how to do the migration from BCB3 to BCB6 properly? 
Thanks, 
Mike

Re: BCB3 to BCB6

#85

Author: Remy Lebeau (TeamB)
Date: Fri, 18 Mar 2005 18:45

15 lines
1536 bytes

"Mike Heneghan" <heneghan@astound.net> wrote in message
news:423b16a6$1@newsgroups.borland.com...

> All of the code in the constructor is skipped and the
> program jumps to the FormCreate method.

NEVER NEVER NEVER use the OnCreate event to begin with!  For exactly the
reason you have seen - the OnCreate event can be triggered BEFORE the
constructor, which is illegal in C++.  Put all of your code in the actual
constructor instead.  Also, stay away from the OnDestroy event, as it can be
triggered after the destructor, which is also illegal in C++.


Gambit

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