Hi,
I'm still taking
baby steps into COM and ATL and I've run into my next problem. I'm writing a
server that is instantiated by an executable for which I have no source code. I
can trigger the executable to create an instance of my server; when something
goes wrong, the only error message I get from that executable is the COM error
code. I'm past the stage where I kept getting 'class not registered', so that's
good; thing is, I now get 'interface not supported'. I do have an IDL file with
a bunch of COM interfaces but I don't have any documentation on which interface
I should implement (and how). So my first idea was to override the
QueryInterface() method in my ATL object and log the contents of the riid
parameter to a file. I hacked the END_COM_MAP macro a bit and it compiled ok but
when I triggered my blackbox executable I got the 'interface not supported'
again (as was to be expected) but worse, no file was created (so my
QueryInterface function on the ATL object wasn't called). Now I was thinking,
maybe I should first try to override the QueryInterface of my CoClass and see if
that works? But how would I do that? Is there maybe another way for me to find
out which interface is requested? Thanks.
cheers,
roel
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