A previous thread on this forum, dated 6/24/2003 at 4:48:36 PM, explains how to manually call LoadLibrary to load a DLL from a full path given dynamically at runtime, as detailed in http://www.dotnetinterop.com/faq/?q=LoadLibrary I have encountered the following problem when I do this:...more >>

Hi all. I'm writing some .net compoents that are also going to be used from vb6 code. Is there a way for me to distinguish all the different types of exceptions that the .net code my throw ? My .net component can throw a few different types of exceptions and I need my vb6 code to take action di...more >>

Can anyone tell mw why REGASM would be giving me the following error: Type MyType from Assembly blah, Version,Culture, publickeytoken can not extend from any other type. I am not sure why I am getting this error as I can see nothing wrong. There is also no documentation on this error and w...more >>

Hello - We have a VB.net app that utilizes Office Web Components, including the pivot table and spreadsheet components. The app works fine under normal conditions. However, when we run the app through a Citrix server, there is one exception. If, during the course of a user session, an...more >>

I wonder if anyone can help me unravel the following. (Sorry for the detail, but I don't want to miss out anything that later turns out to be important!) I have written a simple .NET console application that references an in process .COM server (written in house, but not by me). All works we...more >>

Hi, I'm programming an application that have to generate a=20 Word Document.=20 I have the basic commands to create, modify and close a=20 document but I would like to know if someone have tutorial=20 or help about all classes and methods of the namespace=20 Word. Thanks a lot. Best ...more >>

I implemented C# .NET DLL (a.dll) for used in both .NET (b.dll) and VB6 (c.dll) business logic DLL. They are then called by ASP.NET and classic ASP respectively. For .NET environment, b.dll calling a.dll is working fine, so I know my .NET a.dll is working. After I GacUtil and regAsm to m...more >>

Hi! I encounter the following problem: Let's have a simple .NET COM class. using System; using System.Runtime.InteropServices; namespace Galaxy.Guide { [Guid("F747532F-D6F7-4c4b-A372-76DBC4CDD02A")] public class DeepThought { public void TheAnswer() { System.Windows.Forms.Me...more >>

Marshal.PtrToStructure() documentation indicates that it returns a "newly allocated managed object" from unmanaged memory described by IntPtr. Can the allocated memory be free'd immediately after PtrToStructure() ?? and are all members of the managed structure returned accessible? Are there cas...more >>

The keypal .NET utility has been updated to show which of the listed CryptoAPI key containers have an associated MY store certificate. Source code is provided showing P/Invoke approaches to calling Win32 CryptoAPI functions of various types: http://pages.istar.ca/~neutron/dotnet/keypal -...more >>

Probably a simple marshaling question: ..NET value types passed as arguments via P/Invoke must be prototyped and passed as ref to marshal back changes to the value type. Fine. According to the .NET MSDN docs, IntPtr is a value type. Why then when a prototype is configured (for example to ge...more >>

Hi! In the docs it says: "To gain this control, you need to implement your host's IDispatch so it handles DISPID_AMBIENT_DLCONTROL. When the WebBrowser Control is instantiated, it will call your IDispatch::Invoke with this ID." (ms-help://MS.MSDNQTR.2003FEB.1033/ProgIE/workshop/browser/hosting...more >>

Dear all: My C# program need a string returned from a Fortran Dll. The Fortran Dll is like this: SUBROUTINE REDO(s) !DEC$ ATTRIBUTES DLLEXPORT::REDO, C CHARACTER*(*) s !DEC$ ATTRIBUTES REFERENCE :: s s = 'Let them talk, now!'C END And I use C# PInvoke to call it, the client code lik...more >>

I've got a third party C dll that I need to make use of from C#. I am attempting to go directly against it's C-style API with P/Invoke rather than creating a COM wrapper or somesuch other approach. The problem I am facing is that this dll defines a struct that has two fixed lengths arrays as m...more >>

I'm trying to generate some custom excel spreadsheets from VB .NET 2003. = I keep getting the following error. I have a reference to Microsoft Excel 9.0 Object Library in my project, = version 1.3. An unhandled exception of type 'System.InvalidCastException' occurred in = Generator.exe Ad...more >>

I am pulling my hair out with this one. I have the PrintDlg structure and want to get the default printer from this. [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)] [System.Runtime.InteropServices.ComVisible(false)] public class PRINTDLG { public Int32 lStructSize; public...more >>

Hi All and thanks for reading: My C# function looks something like this: public void MyFunc(int dbId) { if (dbId==null) {DoSomething();} else {DoSomethingElse();} } How do I pass a null to dbId from an old style ASP page? I've tried passing vbNull (becomes 1), Nothing (becomes 0)...more >>

Hi! Does anyone knows how to debug a C++ dll within a c# program with Visual Studio .NET 2003. Any help would be apreciated. regards --- Philippe Desgranges aka Tsunami 3ie Team Member www.3ie.org ...more >>

I was having a problem implementing IHTMLPainter in C# and saw that you had been trying to help someone else with the same problem a few months ago on: microsoft.public.windows.inetexplorer.ie5.programming.comp onents.webbrowser_ctl Here is the link to the thread on google: http://groups...more >>

Hi Doeas anyone know if is a tool or a way to convert a .Lib File of C Version 4.0 to Dll so i can used it from VB.? Thanks in advance ...more >>