>The MapiMail class from samples is not suitable for me, because (altough it launch the default e-mail client -- in my case, Outlook Express), it needs to register two .OCX files.
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>If customer's operating system needs to be wiped and reinstalled from scratch, my application won't run anymore, because the ActiveX controls are gone. Also, I don't want to reinstall the application, because the setup wizard will overwrite database, if application is reinstalled in the same directory. I dont't even think about the users reinstalling the application (brrrr!)
>

If the customer needs to wipe their drive, surely they'd need to reinstall the software. If this will overwrite the data on the server, it shouldn't - there should be a different installation for a client than the server.