thanks for your prompt reply. I also sent an e-mail to Destinator guys (once again), just in case they have any update for the ActiveX component error. I'm not very optimistic that I'll get a reply but you never know!
I did copy the two *.h files C:\DestinatorApps\Include\PC to C:\DestinatorApps\Examples\C_Client and I also had to change the #include refenerce at line 20 of file StdAfx.h. After that, I try to build the C_Client project and I get the following output:
Deleting intermediate files and output files for project 'C_Client - Win32 Debug'.
--------------------Configuration: C_Client - Win32 Debug--------------------
c:\destinatorapps\examples\c_client\destsdk.h(35) : error C2146: syntax error : missing ';' before identifier 'IDrumBuffer'
c:\destinatorapps\examples\c_client\destsdk.h(35) : fatal error C1004: unexpected end of file found
Error executing cl.exe.
C_Client.exe - 2 error(s), 0 warning(s)
I don't have time to investigate right now, but I'll give it a try the following days. If in the meantime you've found something, please let me know!