COM *ps.dll

I have a com service built on VC++ 7.1, I have my service exe and ps.dll, as I know for a client machine to communicate with a service it needs only to register ps.dll, then it has to call CoCreateInstanceEx with coserverinfo server name set to "MyServerName".
Then I read in MSDN that it could be done with CoCreateInstance (without -Ex), I have to set context to CLSCTX_REMOTE_SERVER and there should be RemoteServerName value somewhere in registry.

So do I understand it right? And where should be RemoteServerName value in registry??
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It is indeed possible with CoCreateInstance.

The structure of the registry would be this:
The HKCR\CLSID\{xxxx} key would have an 'AppId' string value and it's data would be another guid (1) - typically this is the same as the CLSID.

The HKCR\AppId key would have a sub-key (1), and it would have a 'RemoteServerName' string value, the data specifiying the remote server name.

And yes, it is better to explicitly state CLSCTX_REMOTE_SERVER.

[HKCR refers to the HKEY_CLASSES_ROOT hive]

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Should have mentioned.

Using CoCreateInstanceEx with coserverinfo server name set to "MyServerName" allows you to bypass the RemoteServerName stored within the registry. RemoteServerName can be viewed as a 'default'.
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