I have an app which creates a window and C# and needs to pass the window handle (HWND) and App Instance (HINSTANCE) to a C++ dll whicj will do some direct show stuff. I have created the C++ MFC app and pass the window.Handle (System.IntPtr) There is a wrapper which looks like: [ DllImport(...more >>

Hi, i created a dll for database access. i use it in combination with a foxpro dbc. using it directly in an application and/or with mssyl, it works fine. if i wrap it in a com+ dll and want to open the OleDbConnection it fails with the following error: at System.Data.OleDb.OleDbConnec...more >>

Howdy, Is there a way to get the VB6 calling application name in a .net dll called via com interop? What I am trying to do is determine what the app.config file should be named when the .net dll objects are called from ASP. My guess is going to be either svchost.exe or dllhost.exe but I was...more >>

I had a .net control running fine in vb6. I change something in the control and now I can still get the .net control on the vb6 form, but i can only see the standard properties, not the ones I've added. I tried creating a new project with a new control and it now does the same thing for every ....more >>

In my program I am setting the DllImport attribute as so.. [DllImport("mydllname.dll")] public static extern void etc etc.. The dll gets updated often so I wanted to store the dll name in an App.config and then have the program set the attribute. Is this possible? Any help appreciated. Jo...more >>

Hello everybody, We are evaluating the use of C# and GDI+ to develop a GUI based application which elaborate image (stored as array of native type). This application needs to call several native C functions in order to perform some intensive computation on the image. Basically I will store th...more >>

I have written a service that uses a VB6 COM dll. The service access the COM dll through a .Net wrapper assembly and interop assemblies generated by Visual Studio. I have a windows forms application that I used to test this assembly. The service runs fine when tested on my Windows XP mach...more >>

Greetings, I don't know if anyone here is writing applications that implement OLE Automation but I was hoping to have a bit of a discussion about it. I'm looking at implementing script support for one of my applications (written using MFC). There's a fair amount of code for doings this and I...more >>

I'm using LoadLibrary to import a DLL in a asp.net application. The dll was written in c++ and is located in the bin folder I have been testing the website on my development machine and our inhouse webserver running IIS 5.1 and it works correctly. I'm specifing a real path to LoadLibrary ...more >>

Hello, I am trying to get a .net Dll to work in VB6. I have done the instructions as per http://www.findarticles.com/p/articles/mi_zddvs/is_200504/ai_n13591391 I create my Dll using ClassInterface(ClassInterfaceType.AutoDual) then i run gacutil /i dllname.dll then, regasm dllname.dll ...more >>

We have created a MDI application that uses a AxSHDocVw.AxWebBrowser component on one of the child windows. As soon as this child window is created, none of the open MDI child windows is activated if clicked upon, except for when the window border or title bar is clicked. So the problem ...more >>

Hi, I have an plugin application (i.e. my application consists purely of dlls) that is both C++ COM and C# .NET. My various COM and .NET objects interact both ways using interop. I would like to deploy my application using xcopy, i.e. without registering anything on the target machine. I...more >>

Hello, the SDK says about the Pack field: --- Controls the alignment of data fields of a class or structure in memory. This field indicates the packing size that should be used when the LayoutKind.Sequential value is specified. The value of Pack must be 0, 1, 2, 4, 8, 16, 32, 64, or 128. ...more >>

I have a problem with a third party Active-X control. The control is written in unmanaged C++ (VC6 I believe) and it is used to display the contents of a file. The control has two methods, Open and Close. It does not use any .NET internally at all. When the control is used in an unmanaged ...more >>

Hello everybody... I have 3 components…. In component A, there’s a method named “MA”. Access Database only to get some data In component B, there’s a method named “MB”. Access Database only to get some data In component C, there’s a method named “MC” The method “...more >>

Hi Friends, I have a strange problem, I am using Office XP PIA's to extract the text from any office file. I downloaded the office XP PIA, and developed a module which extracted text from any file that is uploaded to the server using Visual Studio.NET 2003 and .NET Framework 1.1. During developm...more >>

Could anyone please help me out as to how we can save the excel workbook in the database and read it back. I was able to convert the text files and image files into binary format and save them to the DB and finally able to retrive them back in the same format. But was unable to do s...more >>

We have a windows application(MDI) written in C#.Net, which has an IE Webbrowser control embedded in the page. Dialog opened could be a .Net form with a web browser control or can be an independent IE window opened from the web application hosted in the browser control of the parent windows form...more >>

Hi, I have a COM object that I am using via c#. THe object supports a method that checks an angle lower and upper limits and returns a bool. The reult is either a pass or fail, if it fails further information is passed via the HRESULT indicating whether it failed the upper limit or lower ...more >>

Hi I've got little problem. I've created a dll library in C# .NET and turned on compiler option for registration for COM interop. Compiler made type library file which I can use as interface for this library from unmanaged code. But it is not very elegant for me if type library is outside dl...more >>