Re: dynamic_cast does not work in packages

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#2571

From: Torsten Franz
Date: Thu, 15 Feb 2007 15:07

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>> Have you tried using LoadPackage() and UnloadPackage() rather than
>> LoadLibrary() and FreeLibrary()?
>
> yes. with thesame result.

Hi,
I once created a plugin system in our company with BCB5 and had the same  
issue in the very beginning.
The way to solve it was to ensure that all parts of the program (plugin,  
host, base bpl/dll) are compiled with dynamic RTL and VCL otherwise you  
end up with different instances of the VCL as already described by Remy.

To accomplish dynamic linking it might be useful to check your sources for  
'#pragma link' entries which should be removed.
Additionally you should check in all project files that the LIBRARIES  
section is empty, the SPARELIBS section should contain the same entries as  
found in the PACKAGES section (except the different extension of course)

HTH
Torsten

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Date: Thu, 15 Feb 2007 16:07:40 +0100
Subject: Re: dynamic_cast does not work in packages
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