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Mixing in-process and out-of-process COM servers

Posted on 2013-11-21
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Last Modified: 2013-12-17
Hi all. Please tell me if this is possible. I want to create an executable (I'll call it HostExe) that will be used by other executables to obtain some COM interfaces. The COM interfaces will be built as we need them and thus I would like the interfaces to be inside a DLL. I would then like to have my HostExe 'see' the DLLs (look in a particular folder) and then load the dlls into the HostExeaddress space. Then the other executables would get the interface (object) from the HostExe. Is this possible? (I'm not sure it is even clear non-the-less possible :) ). If it is possible, can you give me example (psuedo code is fine) code? Or send me to an article/document?


Thanks, Brian
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Question by:BrianDumas
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7 Comments
 

Author Comment

by:BrianDumas
ID: 39667332
Another bit of information. I don't want to recompile the HostExe each time a  new interface comes out. I would like it to be dynamic. That is, I would like the HostExe to realize that there is a new DLL, load it, and register the interface as if the HostExe is the owner.
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Accepted Solution

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jkr earned 500 total points
ID: 39667490
This should be possible - just the DLLs that implement the interfaces strictly speaking are not COM DLLs (i.e. no 'DllRegisterServer()' etc.), but plain Windows DLLs, the only hold the code.  So, basically the executable loads the DLL, the DLL provides some entry points that e.g. get the CLSID they implement, return an interface pointer, and all the stuff you need. Well, you could also add  'DllRegisterServer()' if you want them to be able to act standalone. If they are just not registered with COM and allow the executable to obtain the required information, that should work.
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Author Comment

by:BrianDumas
ID: 39668786
Thanks jkr. I'll check this out and come back with either more questions or to accept the solution.
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Expert Comment

by:LeeTutor
ID: 39721509
I've requested that this question be deleted for the following reason:

Not enough information to confirm an answer.
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LVL 86

Expert Comment

by:jkr
ID: 39721510
Since "Delete" is the only option that LeeTutor knows in the cleanup process, that would be reason enough to object. Yet I have to add that "Not enough information to confirm an answer." simply is incorrect, even when stated by a non-programmer. Thus, I object.
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