I have the header file for an old dll I need to use from C# : #define API_NAME_SIZE 30 #define API_COMMENT_SIZE 30 typedef struct { unsigned long a_reference; char state; char name[API_NAME_SIZE+1]; char comment[API_COMMENT_SIZE+1]; } api_a_info_type; typedef struct { ...more >>

Hi! I want to add a strong name to my class library which depends on a COM Component, for which the interop DLL is automatic build. But the compiler always yells "Referenced assembly does not have a strong name" How, can I sign this automatic build interop dll ? Johnny ...more >>

I need to be able to pass streams across the Interop boundary. Using the article http://support.microsoft.com/default.aspx?scid=kb;en-us;321695 I can call into and ATL COM object that has a method STDMETHODIMP CSimpleObj::GetUnmanagedData(IStream** ppData) from .NET using the following C...more >>

Hi, I am automating ms word 2003 through .Net office interop, and my app is running on an unattended server. If I try to open a password protected document, word pops up a dialog box asking for the password. Obviously since the machine is unattended, there is nobody to press cancel, so m...more >>

I have a union of structs that is returned from an unmanged C++ API. Everything works fine until I add a specific type of struct [EvEndBitInfo] as a member of the union. I know you can't mix value and reference types in the same union, but I don't see the conflict because I believe all members o...more >>

First I want to check and make sure that I can call non-system dlls and MFC dlls at that. Assuming that I can, I've been getting an EntryPointNotFound exception for the follow code: C# calling code... [DllImport("pptcontroller.dll")] public static extern int PPT_Start(string PPTFileName); ...more >>

We have an application written in VC++ 6 which uses late com binding to execute methods in dll's dynamically based upon registration information in a database. This app is affectionately know as "the engine". We are moving to .net and at this time don't want to rewrite the engine; however, we wa...more >>

I'm trying to automate excel from visual c#. One thing I need to be able to test is if excel is even installed on the target machine and what version of excel is installed on the target machine. Is there a way to do this via c# code? Thanks. Mansi...more >>

Hi, I have an unmanaged DLL that I have written a managed wrapper around, however I am getting intermitent crashes where it seems like the heap has been corrupted. My theory is that a garbage collection has moved something that I didn't expect to be moved. I have scoured the code and have...more >>

I am making an event sink that will recieve the mail object, process it, and then delete it. Is my understanding correct that the OnSyncSave event happens in memory before there is any disk activity? I would really like to avoid disk access if possible. Thanks dave...more >>

Hi All, Am having a problem trying to receive events from a COM object when the VB.Net program is running as a Windows Service. The same code works fine when running as a Windows Forms app. I can create an instance of the COM object, call methods and set properties, but when I call the m...more >>

Hi i have an application hosting webbrowser control in design mode. I also wrote a custom OleUndoManger. My problem is if I move or resize a html element the application crashes. With NullPointerException. Can anybody check if the definition is correct? TIA dom Please respond on d...more >>

Hi. I have a RCW class that was generated by the VS.NET2003 IDE when I added a COM dll reference to my project. This all works fine when I call methods on it. My initial problem is that in ASP.NET I would like to add this to the Session object whilst using SQLServer as the session storage. Unf...more >>

Hi, I want to deploy an RCW to the GAC, my question is if I create a Windows Installer to deploy this RCW to the GAC, do I also have to register the COM ..dll using the installer? How would I do this? Does anybody know of any good examples of creating a windows installer to do some or all o...more >>

Hi, I have a .NET assembly that I am trying to register as a COM dll. The problem that I am faced with, is that this assembly has two classes, one of which is a Windows Form. As of now, I have a ComRegisterFunction in both of the classes, but I am getting a "DLLRegisterServer entry point wa...more >>

Nedd help with marshaling: have this struct in C: typedef struct OB{ unsigned char bC; unsigned char bR; unsigned short wC; VARBLK(MAX_SIZE) Im; VARBLK(MAX_SIZE) Te; } OB; With VARBLK defined like this: typedef struct tagVARBLKHDR { int iSiz...more >>

I have a C# class and an unmanaged C++ class. I want them to communicate with each other. (through function calls). To achieve this, I create a managed C++ Wrapper class that takes a delegate from the C# class, and try to convert it to a pure C++ function pointer, so that the Unmanaged C++ cla...more >>

I have a c struct like this: typedef struct OB{ unsigned char bCamNum; unsigned char bResolution; unsigned short wCRC; VARBLK(MAX_SIZE) Im; VARBLK(MAX_SIZE) Te; } OB; It comes from a callback that just works fine, but at the moment of inspecting it, in says "This type can not be ma...more >>

Hi, I have created a dll with some functions to use in excel, but after i compile the code and try to use it in excel it gives me an error like it could not find the file "mscoree.dll" who can i overdue this error? And why does it show mscoree.dll and not my dll file name? Best Regards, ...more >>

I have a function in C that returns an array of pointers in a parameter : NAGR( OUT OB_R ** pprResources, OUT int * pnNumResources ) No matter how I marshall it, i only get the first element of an array of 6. I get the first element quite well with all its data correct, but my array of p...more >>

Need to be able to set the password for the account used by a given DCOM object. What options do I have here? I don't suppose any of the native API functionality for this has been wrapped in .NET yet? To be clear on what I'm trying to change, if you run dcomcnfg and view an application's ...more >>

I am developing a component that i needed to receive formulas requests from excel. Lets suppose i have a function in a shared add-in dll using PIAs from Office 2003 and when i am using excel and insert a formula like "=formula1(arg1,arg2) matching a formula in my add-in it will execute and ...more >>

Hi all I wonder if someone can help me. I have a VB.net app which does bits and pieces with an excel sheet (opens it and reads some cells). I am having problems getting the excel app to quit unless I actually close my application. I've read through a number of the threads through Google, ...more >>

I have experienced a problem similar to that of a topic previously covered in this group - 'Regasm.exe Interop problem'. However, I would like to try to go a little deeper so that I better understand what is happening. As in the 'Regasm.exe Interop problem', when attempting to use my C# compo...more >>

i'm new to .net.i want to create component. how to i do it? moreover,i doubt that Dll is the component,right? if i create the component,what standard is it base on? ...more >>

Hi all, I'm trying to create COM wrapper around a class that needs to use remoting to perform its tasks, so that I can unload the AppDomain after it's done. I've build the code to create the AppDomain and load the MarshalByRef object into the other domain. All works well when running this co...more >>

HI all, I have a COM Interop assembly I'm accessing through VB and VFP. I'm trying to debug the thing in VS.NET and it turns out I can't because it's loading V 2.0 of the .NET framework. If I debug the component as soon as it is accessed with the VS 2003 debugger attached VS closes the running...more >>

I'm calling ShowBrowserBar to programmatically show or hide my own IE InfoBand (IE side panel). In my app, the BHO and IE InfoBand are separate COM objects in a single DLL. This function fails if this particular IE side panel hasn't previously been displayed manually (by going to View->E...more >>

Hi All, I have a .NET component that is callable by a COM application that has worked well, been distributed, for a couple years. The app used the typelib import build into VS.NET that automagically created the Interop.* assembly. Again this has worked as a private application where the .NE...more >>