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    <p>It seems that I succeeded to connect to- and handle Events of DLL (in-proc) Com Server. </p> <ol> <li>I put COM Server as DLL Surrogate (<a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms686606%28v=vs.85%29.aspx" rel="nofollow">HowTo here</a>).</li> <li>Delphi Client Side - form my COM Wrapper Class, inheriting from TOleServer Class I overridden GetServer Method:</li> </ol> <p><code> function TSWMgr.GetServer: IUnknown; begin OleCheck(CoCreateInstance(ServerData^.ClassId, nil, CLSCTX_LOCAL_SERVER, IUnknown, Result)); end; </code></p> <ol> <li>C# (Hello-World Client) side (after consulting some HowTos like <a href="http://www.codeproject.com/Articles/37127/Internet-Explorer-Late-Binding-Automation" rel="nofollow">this</a>): </li> </ol> <p>//using SWLMLib; //using System.Runtime.InteropServices; //using System.Runtime.InteropServices.ComTypes;</p> <pre><code>[Flags] enum ReturnCode : uint { S_OK = 0, S_FALSE = 1, REGDB_E_CLASSNOTREG = 0x80040154, CLASS_E_NOAGGREGATION = 0x80040110, E_NOINTERFACE = 0x80004002, E_POINTER = 0x80004003 } [Flags] enum CLSCTX : uint { CLSCTX_INPROC_SERVER = 0x1, CLSCTX_INPROC_HANDLER = 0x2, CLSCTX_LOCAL_SERVER = 0x4, //... //others CLSCTX_ALL = CLSCTX_SERVER | CLSCTX_INPROC_HANDLER } /// &lt;summary&gt; /// Sink Class implementig COM Server outgoing interface SWLMLib.ISWMgrEvents /// &lt;/summary&gt; [ClassInterface(ClassInterfaceType.None)] class MySink : SWLMLib.ISWMgrEvents { public void FeatureAboutToExpire(SWLMLib.IFeature pFeature, int HoursRemained) { Console.WriteLine("{0} FeatureAboutToExpire: Feature {1} Hours={2}", DateTime.Now, pFeature.Code, HoursRemained); Marshal.ReleaseComObject(pFeature); //WTF??? Without this line COM Server object is not released! } public void FeatureExpired(SWLMLib.IFeature pFeature) { Console.WriteLine("FeatureExpired: Feature {0}", pFeature.Code); Marshal.ReleaseComObject(pFeature); //Without this line COM Server object is not released! } } class Program { //Import "CoCreateInstance" to play with run context of created COM-object (3rd parameter) [DllImport("ole32.dll", EntryPoint = "CoCreateInstance", CallingConvention = CallingConvention.StdCall)] static extern UInt32 CoCreateInstance([In, MarshalAs(UnmanagedType.LPStruct)] Guid rclsid, IntPtr pUnkOuter, UInt32 dwClsContext, [In, MarshalAs(UnmanagedType.LPStruct)] Guid riid, [MarshalAs(UnmanagedType.IUnknown)] out object rReturnedComObject); static void Main(string[] args) { try { Guid SWMgrClassObjectGuid = typeof(SWLMLib.SWMgrClass).GUID; //{8EAAFAD7-73F8-403B-A53B-4400E16D8EDF} Guid IUnknownGuid = new Guid("00000000-0000-0000-C000-000000000046"); //Can it be written in more pretty style? SWLMLib.ISWMgr lintfSWLMgr = null; /* This will create IN-PROC Server because, it seems CoCreateInstance will be invoked with CLSCTX_INPROC_SERVER flag settled Type type = Type.GetTypeFromCLSID(SWMgrClassObjectGuid), true); object instance0 = Activator.CreateInstance(type); lintfSWLMgr = (instance0 as SWLMLib.ISWMgr); */ Guid Ev1 = typeof(ISWMgrEvents).GUID; object instance = null; unsafe { UInt32 dwRes = CoCreateInstance(SWMgrClassObjectGuid, IntPtr.Zero, (uint)(CLSCTX.CLSCTX_LOCAL_SERVER), //if OR with CLSCTX_INPROC_SERVER then INPROC Server will be created, because of DLL COM Server IUnknownGuid, out instance); if (dwRes != 0) { int iError = Marshal.GetLastWin32Error(); Console.WriteLine("CoCreateInstance Error = {0}, LastWin32Error = {1}", dwRes, iError); return; } lintfSWLMgr = (instance as SWLMLib.ISWMgr); } if (lintfSWLMgr != null) { //lintfSWLMgr.InitializeMethod(...); //Initialize object //Find Connection Point for Events Guid ISWMgrEventsGuid = typeof(SWLMLib.ISWMgrEvents).GUID; //{C13A9D38-4BB0-465B-BF4A-487F371A5538} Interface for Evenets Handling IConnectionPoint lCP = null; IConnectionPointContainer lCPC = (instance as IConnectionPointContainer); lCPC.FindConnectionPoint(ref ISWMgrEventsGuid, out lCP); MySink lSink = new MySink(); Int32 dwEventsCookie; lCP.Advise(lSink, out dwEventsCookie); Console.WriteLine("Waiting for Events Handling..."); Console.WriteLine("Press ENTER to Exit..."); Console.ReadLine(); // Until Eneter is not hit, the events arrive properly //Here starting to Unsubscribe for Events and Com Objects CleanUP lCP.Unadvise(dwEventsCookie); Marshal.ReleaseComObject(lCP); Marshal.ReleaseComObject(lintfSWLMgr); } } catch (Exception E) { Console.WriteLine(E.Message); throw; } } } </code></pre> <p>Maybe this is not the best way (like TblImp.exe and or COM Wrappers) but this raw way works.</p>
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    1. POHow to Consume COM Server (ATL, DLL Surrogate) in .NET C# WinService?
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    1. COThis seems pretty much OK to me. I have to admit that it was pretty hard to figure out the actual problem of yours. Hadn't I read through your example code and found (by chance) the line with the "// HERE I don't know what to do further" comment, I would have skipped your posting altogether. Maybe you should have put that in the first line of your posting, or even better into the header line.
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    2. CO@StuartRedmann, to be honest i didn't understand your comment. 1. Was my post too dummy or.. something else? 2. At least.. was my response somehow useful fro You?
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    3. COI don't know how that happened, but I definitely did not reply to your comment but to OP's question. Maybe I don't have enough privileges to comment on questions but only on answers?
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