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.netcomwinapiportable-executabletypelib

how to know about the type of com server using type library?

Is there any attribute, property, or method available which tells whether a given type library is an in-proc COM server or an out-of-proc COM server?

Solution

  • No there's not. The type library merely describes the interfaces, it is used by a compiler.

    Whether an oop or inproc server is used is a runtime detail, determined by the dwClsContext argument for CoCreateInstance(). A COM server can support both, although that's not exactly common. You'd always know enough about the server to know what CLSCTX value to pass. If you really want to find out you can always read it back from the registry by opening the CLSID key. Look for LocalServer32 vs InprocServer32.