Need help!!! This works on my development machine (of course). I have 2 com+ components installed on a win2k server. 1 is a vb 6.0 dll and 1 is a vb.net dll. Here is the scenerio: I installed both on the server by exporting .MSI packages from my development machine and running the package on...more >>

I'm trying to use a callback with the following signature from C# code. DWORD CALLBACK YourStreamProc( HSTREAM handle, void *buffer, DWORD length, DWORD user ); This callback is invoked from a library (in C; the library is BASS www.un4seen.com). The buffer parameter poin...more >>

Hi, We are using .NET MarshalByRef remoted object that we use in a COM Interop scenario. When we try to access a member of the remoted object from COM returned by a remoting method call, we get the following error: <VSNET Debugger runtime error> "Run-Time check failure #0 : The value of E...more >>

Hi, We have .NET dlls containing interfaces that we want to use from COM. Each interface has a Guid Attribute specifying its Interface ID. We use regasm in order to generate the tlb and then use the DLL as COM #import statement in a C++ project . For some reason, when the tlb is generated, ...more >>

Dear all, I am using a Delegate to callback from a C dll which takes in input a function pointer. The Delegate is called back and the struct is filled properly, but just after the delegate function finishes, the application crashes. "Memory cannot be written" The application referenced memor...more >>

I've been having all sorts of trouble with automating Office XP from .NET, the PIAs just seem to be unusable! I just hope that it’s just that I’m doing something silly, please could someone point out to me! I’ve had problems trying to make calls as advertised in documentation (see my post â€...more >>

Hi, i have a managed COM component with an array as parameter like this: public byte[] ProcessPdfDocument(string reportPath, string identifier, string boType, string userName, bool storeDocument, string[] parameters) Now i want to call this method out of an ASP Page (JScript) : var bo = ...more >>

I am trying to use the OWCMDX.dll (an unsupported DLL that ships with SQL Server 2000) in order to assign MDX queries directly to PivotTables (Microsoft XP Office Web Components). I imported the dll into a .NET Windows Forms application using Visual Studio's Interop support. When I attempt to ex...more >>

I have some .NET classes which I intend for possible use with VB 6 (or other COM-compliant language). On some of my objects I have defined a default property which takes an argument, e.g. Dim fols as Folders Dim s as String Set fols = New Folders s = fols("SomeFolder").Name In this exampl...more >>

Hi, I'm having trouble calling the function CryptRetrieveObjectByUrl (found in Wincrypt.h). I posted to this forum earlier and I got an answer which I now have tried without success. The declaration looks like this: [DllImport("cryptnet.dll", SetLastError=true)] protected static extern boo...more >>

Hi experts, Can anyone show me how to call a function defined in a normal Win32.dll ? Thanks in advance Kinh Luan...more >>

When i create an ATL object and i try to use new statement the compiler say me Impossible to create an abstract object Why? ...more >>

I have a fortran exe (asos.exe), which outputs a text file in the same directory as that of the exe. When this exe is invoked individually, it outputs a text file. I tried to invoke it from .net form, using shell command / system.dagnostics.process.start, but it writes to the console and not to ...more >>

I'm in the middle of a project creating a MS Publisher document via C# and Office interop. The error messages that are returned are less than desirable. For example. I create a textbox, set its text and then set its AutoFit to BestFit so that the text fits correctly. On some occaisions I ...more >>

I have an Interop class that works properly. However, I don't know wich COM-object it calls (I'm not the one that created the Interop class). How can I find out? I've tried to look at the code generated by ildasm.exe and remotesoft salamander, but I can't find the call to the COM-object. All I...more >>

Hi all, Ive done the searches etc, and although Ive read many interesting articles and posts, Im not sure they were relevant to my case: I am using a simple ActiveX control (the Bloomberg Data Control to be specific). I use application.Run to execute a method where I create an instance of t...more >>

I have an application that is split into two parts--the user-interface portion, written in C#, and a C++ DLL that contains both managed and unmanaged code, where the unmanaged code is core processing that needs to be as fast as possible. Now, during the course of one of these long unmanaged...more >>

I have a VB6 application that now uses a C++ .NET DLL via COM. The .NET dll was developed on one computer, and to move it to mine, I simply copied it and its tlb file over, ran RegAsm <full Path>\MyNet.dll then dragged it into c:\windows\assembly. On another computer here that has the .NET Fr...more >>

i have created a DLL in vb.net which exposes its functionality to COM clients. the vb.net DLL has an app.config file because it has URLBehavior = Dynamic for a number of web references it uses. now, if the VB6 client that uses the assembly, the assembly itself, and the app.config file are a...more >>

Hi folks; I'm working on an ASP.NET 1.1 app, and one of my classes is a managed class that has a private member typed through COM Interop. During the initial page load Interop appears to be functioning correctly, however for various reasons I need to stuff the object into Session and then de...more >>

Hi All, I'm trying to pass a variable length string from unmanaged code to managed code. It's actually from a DLL written for the Pocket PC 2003 in embedded Visual C++ 4 to an app written for the Pocket PC 2003 using the .Net Compact Framework in Visual Studio .Net. What I'm trying to do is...more >>

Hi, I'm developing an OPC Client application with C# (VS.NET 2003) on a computer running WinXP. Im connecting locally to Matrikon OPC Simulation Server. Everything works fine in my computer, but when try to run the application on another computer, which has Win2000 and Matrikon, problems ari...more >>

I want to work with Office XP Primary Interop Assemlies (Office XP PIA) with Visual Studio.Net 2003. I want to build an OLAP Reporting Application in ASP.NET Using SQL Server 2000 Analysis Services and Office XP OWC (PivotTables and Charts). I have create a new project with Visual Studio.Net ...more >>

Does Marshal.AllocHGlobal lock the memory it allocates (e.g. GlobalLock)? Howard Weiss ...more >>

[Sorry for cross-posting, but this topic equally relates to remoting and interop!] I am extending a legacy app which uses DCOM to implement a networked client-server architecture. As some more recent parts of the app are written in .NET, I would like to use it for my new extensions. I have bee...more >>

How do I run a batch file from within vb.net?...more >>

Hi! I'm trying to develop some MS Word automation from within a VB.NET WinForm application. My user base has either Office XP or Office 2003 installed. I currently have Office 2003 installed. Two questions: 1. Is it possible for me to develop against the COM V10 without installing Office XP...more >>

Hello, I am building a VB.NET form interface for a legacy Visual FoxPro 7.0 (VFP) DLL (which contains our business logic). Basically, the form instantiates multiple instances of the VFP object (via COM interop) in separate threads. I would like each VFP object to be completely independent ...more >>

I am using Microsoft Visual Basic .net 2002 Standard. I am coding an application which loads in data from a compressed file. One of the items in the file is a raw RGB565 bitmap, at 800x600 pixels. In a previous version of my app, I used Bitmap.SetPixel() but performance got to be an issue as it took...more >>

Hi! I'm trying to get DACL and SACL flags for a given object (file, registry key, etc.) using C#. I'm using GetNamedSecurityInfo to get a pointer to the security descriptor of the object. After that, and here is my problem, I want to use LookupSecurityDescriptorParts to get the entri...more >>

Hi Folks: I have difficult to marshal a sturct array in another struct. Both my managed and unmanaged codes are listed below. I appreciate anyone help me out! Thanks! chaor In unmanaged code: typedef struct { int z; char c; } A; typedef struct { int y; A a[3]; } B; In manage...more >>

I don't understand why i get an InvalidCastException when calling Marshall:ReleaseComObject() in this code : RCW -----> CCW ----> .NET Control p1 p2 p3 void Proc( IUnknown* p2 ) { Object* p1 = Marshal::GetObjectForIUnknown(p2); // p2 is a CCW on...more >>

Does this managed C++ code always work? another solution? void Function( System::Guid clsid ) { Guid* __pin * pClsid = &clsid; REFCLSID refClsid = (REFCLSID) *pClsid; UseRefClsid(refClsid); } void UseRefClsid( REFCLSID clsid ) { ... } ...more >>

hi, how to convert the following strut into safe struct in c#? struct in C++: typedef struct { char m_username[USER_LEN]; char m_password[8]; char m_userIP[16]; }USERPARA,*PUSERPARA; typedef struct{ char m_starthour; char m_startmin; char m_stophour; char m_sto...more >>

Hello, I have a COM+ component (ServicedComponent) running as a service control manager service on Windows 2003. I am using JITA and the component is configured not to use transactions. The client (.aspx page running on the same server) instantiates the object and makes a method call (refer...more >>

Hi, I have a VB COM dll (which is set to binary compatibility). I created a interop dll and using it in a ASPX page. This is working fine. I rebuilt my VB dll and my aspx page stopped working. I generated another interop dll, now it is working. Should i have to generate ineterop dll, when ever i re...more >>

I added a reference to the COM object SHDOCVW.dll. It of course created the Interop.shdocvw.dll file. As I understand it this is for the Runtime Callable Wrapper, so .NET can call on the COM object with interoperability. Now, my problem is that it says when I try and load the design of the ...more >>

Hi, CLR profiler shows me that all my calls to Marshal.PtrToStructure(IntPtr, Type) are allocating on heap. I tried to use overload with (IntPtr, object) signature, but because my structure is value (?) calls are causing cordbg to start. Structure is like public struct MyStruct { int ...more >>

Hi all, I'm having problems with a delegate used as a function pointer in a = pinvoke method that takes a callback function. When I supply a = delegate, the CLR seems to just die on me. By die, the symptom is that = during my NUnit test, NUnit simply stops running and disappears. No = catc...more >>

Hello, I have written a ASP.NET (C#) front-end that connects to an unmanaged win32 c++ dll. A few problems occur: -I am unable to use the IO stream (write to an event log) from the dll. Although I can successfully use an IO stream when calling the dll from a regular .net Windows Form. -T...more >>

Hi, I've written a managed DLL in c#. To use it in my VB6 program, I've set the "Register for COM interop" setting in the project properties to True. The VB6 program contains a reference to the DLL, and everything works fine on the development machine. Now how do I deploy it on another ma...more >>

I wonder if Microsoft provides a Primary Interop Assembly for the COM (Visual Basic For Applications [msvbvm60.dll])? I have EXE ActiveX that references the previous VBA file. When I use tlbimp to generate the Interop, it also creates an interop for msvbvm60 and calls it VBA.dll. I wants to cr...more >>

I've been fighting with a bug for some time now, and I can't figure out what's causing it. It shows up in different contexts but the top of the call stack is always the same: mscorwks.dll!SafeRelease() + 0x58 mscorwks.dll!IUnkEntry::Free() + 0x59 mscorwks.dll!ComPlusWrapper::ReleaseAllIn...more >>

Hello, I am building an C# UserControl wich will be used in VB5 as ActiveX- Control. This works fine; only one problem: The "Font" Proptery is not shown in the VB5 designer !? So what could I do ? -- Greetings Jochen Do you need a memory-leak finder ? http://www.codeprojec...more >>

Hi everyone! I have created a toolbar to use in MS Access 2000, 2002, 2003. I would like to be notified when the user select a new database or close the current one. Also I would like my toolbar to remain available even if no database is opened. I am presently using Interop from a VB.NET Ad...more >>

Hi, I'm having trouble converting a C++ structure to C#. This is the definition of the C++ structure: struct PLUGIN_PUBLISH_LIST { int nCount; char sName[50][128]; char sValue[50][128]; char sHelp[50][256]; }; So basicly its a array of 50 strings for each, with a 128/256 ch...more >>

Hello, I am using an ActiveX control in a C# (vs 2003) forms based application. There is one particular method that I can't use in C#, but strangely I am able to use with VB.Net. The method (actually a function that returns a Long) is called "WriteMultiVariables" and takes 3 parameters: (i...more >>

When using the tool tlbimp, it uses the attribute TypeLibTypeAttribute where applicable to set additional flags on types. I was wondering why when specifying TypeLibTypeAttribute on my classes then generating the TLB using the tool tlbexp, the attribute is ignored? Is this a bug in tlbexp or ...more >>

What's nice about RTD (vs. DDE) is that excel can start the RTD/COM server just by typing "=RTD("myserver",...)" into a cell. I've written an RTD server in C# that runs great on my development machine, but I'm having a heck of a time figuring out how to register it correctly for COM interop on...more >>

Hi, I'm working with C# and I'm overriding the WindowProcedure the catch the WM_MOVING message. How can I convert the lParam object passed by the Message to a Rectangle so that I can change its dimensions and pass it back to lParam? Any help will be appreciated. Thanks. Andrea...more >>