Bob,

Thanx for your quick response...

Why is it not recommended and what about it is difficult to get right?

Cheers
Chuck

Bob Arnson wrote:
> Chuck wrote:
>> Is it possible to call a third party dll, included in my installer as 
>> a binary file only, from a custom action that is in a C++ dll?
>>   
>
> No. MSI extracts one file at a time as needed to execute a CA.
>> If that isn't possible is that anyway to access a 3rd party dll from 
>> my custom action prior to the installation of files?
>>   
>
> You can extract it yourself, to a secure location appropriate for the 
> user's rights (e.g., on an admin-ACL'd directory when the user is an 
> admin; otherwise local temp). It's not recommended, as it's difficult 
> to get right.
>

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