com-interop

Is it possible to invoke a static method on a .NET Object, via COM interop? I know I could write a wrapper class. What if I don't wanna do that? No you cannot do this. COM interop communicates via objects, not types. Work arounds I know of ... The best work around is to create a wrapper method on an instance to do the call on the type. Yes this still requires an instance so it defeats the purpose but it's you're best option. Reverse PInvoke: Still requires you to pass a function pointer down to the C++ layer 来源： https://stackoverflow.com/questions/1395897/how-can-i-invoke-a-static-method-on-a

I am attempting to write a component in C# to be consumed by classic ASP that allows me to access the indexer of the component (aka default property). For example: C# component: public class MyCollection { public string this[string key] { get { /* return the value associated with key */ } } public void Add(string key, string value) { /* add a new element */ } } ASP consumer: Dim collection Set collection = Server.CreateObject("MyCollection ") Call collection.Add("key", "value") Response.Write(collection("key")) ' should print "value" Is there an attribute I need to set, do I need to implement

Excel VBA is a flexible development environment. It is pesudo-compiled. However, sometimes during development a "state loss" can occur. A "state loss" is when all variables are torn down. Indeed, VBA has an option "Notify before state loss" option for triage. It is unsurprising that one cannot Edit and Continue code in all cases. However, sometimes state losses happen whilst running in production because opening some other workbook may cause trauma to your application session (trust me, it happens!) I know one can persist data to a worksheet cell or even a file but this is inappropriate for

Here is the challenge. I'm deriving from the Framework's WebBrowserSite class. An instance of my derived class, ImprovedWebBrowserSite , is returned via WebBrowser.CreateWebBrowserSiteBase , which I override in my derived version of the WebBrowser class - specifically to provide a custom site object. The Framework's WebBrowser implementation further passes it to down to the underlying unmanaged WebBrowser ActiveX control. So far, I've managed to override IDocHostUIHandler in my ImprovedWebBrowserSite implementation (like this ). I'm now looking for more core COM interfaces, like IOleClientSite

Using VS 2008, here is my COM object using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; using System.Windows.Forms; namespace TestCom { [Guid("9E5E5FB2-219D-4ee7-AB27-E4DBED8E123E")] [ClassInterface(ClassInterfaceType.AutoDual)] [ProgId("Test9.COMINT")] public class TestComClass { public void Init(string userid, string password) { MessageBox.Show(string.Format("{0}/{1}", userid, password)); } } } If I build this and register it on a production machine as follows REGASM /CODEBASE TESTCOM.DLL From a simple VB6 app this works fine Private Sub

I have rephrased this question. When .net objects are exposed to COM Clients through COM iterop, a CCW ( COM Callable Wrapper ) is created, this sits between the COM Client and the Managed .net object. In the COM world, objects keep a count of the number of references that other objects have to it. Objects are deleted/freed/collected when that reference count goes to Zero. This means that COM Object termination is deterministic (we use Using/IDispose in .net for deterministic termination, object finalizers are non deterministic). Each CCW is a COM object, and it is reference counted like any