Managed COM server and COM client. How to subscribe to events of COM server?

hello wrote managed com server , com client in c#. when i’m trying reference com server in com client using code.

type comtype = type.gettypefromprogid("my.comserver", true); object comobj = activator.createinstance(comtype); var comserver = (comserver)comobj;

i reference new object instead of reference registered com server in rot. fix problem, use pinvoke cogetclassobject it works have problem.

private void initcomserver(object sender, routedeventargs e)         {             object comserverinstance = null;              var factory = ole32nativemethods.cogetclassobject(typeof(testcoclass).guid, registrationclasscontext.localserver, intptr.zero, typeof(iclassfactory).guid) iclassfactory;              if (factory != null)             {                 var iid = typeof(itestinterface).guid;                 factory.createinstance(null, iid, out comserverinstance);             }              this.comserver = (itestinterface)comserverinstance;         }

i don’t know how subscribe events of com server.

p.s. i attached small demo  application illustrate problem.
https://drive.google.com/file/d/0b_irffxq3qzqwejmtgjhzwhzwta/view?usp=sharing

hi compaqster,

please don't share demo on third-party website.and have no account in website. you can add demo onedrive.

here link https://onedrive.live.com/

by way, see code routedeventargs, do write code wpf application? if so, please redirect wpf  forum better support.

https://social.msdn.microsoft.com/forums/vstudio/en-us/home?forum=wpf

thanks

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