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c#.netdllcominproc

Check Portable Executable (PE) file for COM signature

I need to programatically check arbitrary Dlls to see whether they are inproc COM servers. In other words, can they be registered on the current system using regsvr32 / DllRegisterServer.

Short of Andy's suggestions on this question, is there a way to figure out the needed without having to:

  • Load the library and check for DllRegisterServer/DllUnregisterServer exports.
  • Attempt registration with regsvr32 while catching exceptions?

There must be something in the PE format that indicates the needed. My assumption is that 'regsvr32' already does this internally. Would appreciate any input.

Solution

  • No. The only thing that makes a DLL a COM object is that it exports DllGetClassObject. The only thing that makes it registerable is that it exports DllRegisterServer.