Bob Arnson-6 wrote
> 
>> then how can a 64-bit operating system interogate a bespoke file format
>> in
>> order to draw a thumbnail preview when it is installed as part of a
>> 32-bit
>> package?
> It can't. That requires a 64-bit package, as I said. The rules are that 
> a 32-bit package can contain only 32-bit components but a 64-bit package 
> can contain both 64-bit and 32-bit components.
> 

Yes it can. Perhaps you shouldn't, but I have included 64-bit VC90 merge
modules and a 64-bit dll in a 32-bit package for the sole purpose of the
operating system being able to interogate our bespoke file format and draw
thumbnails in Explorer when the 32-bit package is installed on a 64-bit OS.

Do you believe then that the light.exe error is deliberate to prevent this
being possible for the VC100 merge modules or that the VC100 merge modules
have been written differently to the VC90 merge modules to similarly prevent
people from merging them into the same MSI?

Cheers, G



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