I've(inherited) a DLL that's built using Fortran(I was told that it's = built using Fortran).=20 When I tried to reference it in a .NET project it(VS.NET) gives an error = message saying that "It's not a valid COM component". Is there any way to use(call) this DLL from a .NET Application ? ...more >>

I have a situation that I need to determine if a particular version of com component is present on user's machine from .NET. In COM I would invoke CoCreateInstance(CLSID_MyComponent2_0) and if this returns an HRESULT with REGDB_E_CLASSNOTREG I would know that this class is not registered. ...more >>

I have the following callback signature and the delegate I am using for the function pointer: //C++ Callback Signature: void(*pErrorHandler)(acTErrorMsgType ErrorMsgType, acTErrorCode ErrorCode, acTBoardHandle BoardHandle, acTChannelHandle ChannelHandle, const char *Format, ...); //C# dele...more >>

I have developed a Exchange 2003 Managed Async sink using the Onsave event. My problem is that I cannot get the sink to run correctly without Microsoft visual studio 2003 installed on the Exchange server. What happens is that the sink is executing as expected without VS 2003 if I do not ope...more >>

Hi OK. It seems one is prevented from automatically 'registering for COM interop' in the Configuration Properties if it's an .EXE project. Tlbexp works and creates a .tlb but examining it with OLE viewer, the publicly exposed .NET classes map to IDispatch interfaces with no properties or meth...more >>

I'm currently working on a .NET client that needs to access functionality in VB6 code. We had the system working, but then we were asked to change some of the functionality in the VB6 project. We set the project for binary compatibility and made the change. The interface for the VB6 class rem...more >>

Hi, I'm having a very weird problem with a wrapper I made around a com object. While creating the wrapper I was testing it by means of a button on a test form, and the COM wrapper worked just fine. It was actually meant to be used in a multi-threaded environment. Now, the library still w...more >>

Hi NG ! I'm not shure if i'm in the right NG but I'm desperate because don't finding help! So i try it here. I have a little c# - application in which i showns some files in a listview. Now i would like to get the Windows Explorer Context Menu, if i press the right mouse button on a file. I ha...more >>

I have this c function GetR( OUT ppp ** ppr, OUT int * pn ) with this strcuture typedef struct ppp { }ppp; I marshalled like this: [DllImport("NetApi.dll")] public static extern int GetR( [In,Out, MarshalAs(UnmanagedType.LPArray,SizeConst=256)] IntPtr[] ppr, out IntPtr pn...more >>

Does anyone know how to capture keyboard scan codes using C#? Thanks...more >>

I'm hoping that someone could point me to the cause of this problem and suggest a solution. I have a C# program that dies with the following: System.Runtime.InteropServices.COMException (0x80040154): Class not registered at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly) at S...more >>

I would like to call a method in an unmanaged C dll from C# using VS2003. However, I haven't been able to successfully do this so far. I am hoping that someone can help me get this working. The method signature for the C function is: HRESULT __stdcall FuncFromCDll(ISomeInterface** ppISomeInte...more >>

I am getting an error when trying to use an ADODB.Recordset that was passed from a VB6 application to a VB.Net class library using COM Interop. I am running this on WinXP SP2 using the .Net Framework 1.1 and MDAC 2.8 SP1. This is what I've done: - I compiled the VB.Net DLL and registered it...more >>

I am getting an error when trying to use an ADODB.Recordset that was passed from a VB6 application to a VB.Net class library using COM Interop. I am running this on WinXP SP2 using the .Net Framework 1.1 and MDAC 2.8 SP1. This is what I've done: - I compiled the VB.Net DLL and registered it...more >>

I have a process that starts starts a windows form .dll on a new thread. The class gets instantiated, and then the StartNavigation() method is called. The StartNavigation method runs the AxSHDocVw.AxWebBrowser Navigate method. As soon as the navigate method finishes running, the window closes...more >>

I have an assembly which I want to use from COM. My project's build has a step to register for COM interop, and if I use COM/OLE Object Viewer I can see my type library. But, I want windows installer to do the registering. So I have put an Installer class in my project and a customaction in ...more >>

Hi, I am writing COM interfaces for some C# classes so that they can be accessed from JScript in Internet Explorer and need to write a collection that my existing JScript can easily call. I need to implement the length property, indexer [] and support the (for xx in xx) construct. I'...more >>

I use SQL Server Merge Replication in a C# Smart Client. Everything works quite well until I try to get the information about occured errors. First I tried to do it like every sample in the web does. I accessed the ErrorRecords property of the merge control, checked the Count property of th...more >>

Here's the breakdown: I have an old C DLL that I want to access via C#. I'm doing this via an outer DLL that wraps the old C DLL in an unmanaged C++ class, which is in turn wrapped in a Managed C++ class. Both these unmanaged C++ and managed C++ classes are compiled into a single assembly ...more >>