In my Java SWT application I'm hosting an 3rd party ActiveX control. I'm using OleClientSite to do this. // Ah, this works. :-) OleAutomation comObject = new OleAutomation(...); There are 2 easy little functions I want to call from Java. Here are the COM function definitions: [id(5)] void easyFoo([in] int blah); [id(20)] void proble...
Good afternoon, does anyone know if and how it's possible to see COM / Interop objects properly (in their correct type) in VisualStudio's debugger? All I get is the 'evil' System.__ComObject value (even though it correctly identifies the type)? E.g.: ...
I am using a third party database. A host application runs the database, and allows client applications to connect to the server app over COM. I am running Windows 2003 Server, and writing all of my code in C#. On the server, I login as UserA, and am able to launch the host application locally, and then run a client app that I have writ...
I'm a limited user, and I need to write an Outlook macro that exposes a C# library in Outlook 2003 and 2007. I do not have any admin privilges at all, not even at install time, so I can't run RegAsm and I can't (I assume) write a managed add-in. Is there any way to call .Net code from VBA in this scenario, or are there any other solu...
Hello. I'm using a third party COM component by means of a .NET interop assembly in IronPython, as seen here: http://stackoverflow.com/questions/1237200/how-can-i-use-a-vb6-com-reference-in-ironpython My experience in this area has been great, I'm very impressed by the amount of stuff that works seamlessly... except one thing. The 3rd...
I need to create a com object for my classic asp, since i can create a .net Assembly and have it 'Interop' with com, so i proceeded to create a .net Assembly like this:- using System; using System.Collections.Generic; using System.Runtime.InteropServices; using System.Linq; using System.Text; using System.Data.SqlClient; using System.Da...
Hi. I'm doing .NET interop via a wrapper assembly generated by tlbimp. Anyway, this thirs party COM object has a method that returns a referance to another 3rd party typelib - actually, DAO350. Calling the method that returns this causes IronPython to fail, presumably because it can't find a type to match it to. Any ideas as to how I c...
This is a follow on question to How to properly clean up excel interop objects in c#. The gyst is that using a chaining calls together (eg. ExcelObject.Foo.Bar() ) within the Excel namespace prevents garbage collection for COM objects. Instead, one should explicitly create a reference to each COM object used, and explicitly release the...
I have a C# project in VS2005 that is referencing a few COM libraries. When I build it errors like this are thrown: Referenced assembly 'assemblyName' does not have a strong name. Now, I used to reference COM assemblies in VS2003 and it would automatically sign the Interop wrappers. All I had to do was set the setting 'Wrapper Assembl...
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? ...
I've written a .NET DLL which is called from another application using COM interop. I'd like to use log4net, but I need to specify the location of the log file at runtime from the other application. I've always used log4net in the simplest possible way for WinForms project, but since a DLL project doesn't have an app.config, and my cal...
IUnknown::QueryInterface() is passed a void** parameter denoting an address where to put the retrieved interface. STDMETHOD QueryInterface(/* [in] */ REFIID riid, /* [iid_is][out] */ void** ppvObject) Should the implementation of QueryInterface() check this pointer for being null (and then immediately return E_POINTER) or just write t...
COM interfaces methods can return various HRESULT values to signal invalid argument values passed. When do I return E_POINTER and when E_INVALIDARG? As I understand if a method receives an index in an encapsulated collection and it is out of bounds that is E_INVALIDARG. If a method receives an Interface** pointer where it is meant to st...
I am referencing a COM library in Visual Studio, so it has automatically created the corresponding Interop assembly for me. I would like to do a GetType() on these com objects, but they always return System.__ComObject. Querying them for an interface works though: bool isOfType = someComeObject is ISomeComObject; //this works But what...
Didn't quite get the following from MSDN: ClassInterfaceType.None Indicates that no class interface is generated for the class. If no interfaces are implemented explicitly, the class can only provide late-bound access through the IDispatch interface. This is the recommended setting for ClassInterfaceAttribute. Usi...
I'm trying to produce a column 'start/length' spec document from a SSIS package that exports a DB table to a flat file. I have hit something of a brick wall in getting the Columns property from the ConnectionManager object that handles the flat file connection. I am able to get the Columns property, but I cannot do anything with it, as...
I have an ATL C++ in-proc COM component. This component is not for external use - I only need it for use in our application. Once in a while users put it into COM+ and this leads to all sorts of weird errors - "Access denied", etc which I'd like to just never hear about. The best way would be to do something that would prohibit putting ...
I've a piece of .NET code that for various reasons (reliability, deployment) must run in a separate AppDomain. I've created a proxy object deriving from MBR that delegates the calls to the real stuff so it wont load in the current AppDomain. I create the proxy via the usual CreateInstanceAndUnwrap. this.eDirectCommunication = (EDirectCo...
When an ActiveXObject is hosted in a Windows Desktop/Sidebar Gadget, that ActiveXObject is sort of cached and the DLL file for it is locked (meaning it cannot be moved, deleted or renamed). The problem is this; when the gadget is subsequently closed, the DLL is still locked by Windows Sidebar and it cannot be removed. This causes a sig...
I am having an issue using a .NET/ComVisible assembly in Excel/VBA. I defined several parameters as "object" in .NET so they will be translated to Variant in VBA since optional parameters in VBA need to use Variant types. The problem is when I try to use the object in Excel/VBA, I get a "Run-time error '424': Object required". I think I...