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Questions tagged [interop]

Interoperability is a requirement for one computer system or programming language to work with another.

Interoperability is a requirement for one computer system or programming language to work with another.

A number of computer systems, especially Microsoft's .NET Framework, reduce this term to Interop.

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Writing C++ intended to be called from C#?

So I am doing this as a learning moment and I'm not afraid to say I have no idea what I'm doing here. It might also be worth mentioning that I don't know much about C++ in this scenario. In C#, I've used DllImport plenty of times to bring in stuff…
Corey Ogburn
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Find the MS Word Table that contain a specific text

I have a MS Word document look like this Now I want to find which table contains the phrase "/CCID_ntRow/". As you can see from the document structure, it's the second table. But every table I loop through, the return of Find.Execute returns…
Hoang Lam
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What are the troubleshooting steps/tools for C# to Native interop?

I have an SDK that is written primarily in C#. We have some native code that was written for security and performance reasons. We use DllImport to interop with the native code. There are a few functions that I get an "Unable to find an entry…
Pat O
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COMException Breakdown

Does anyone know if a site (even non-Microsoft), that has details on COMExceptions/HRESULTS. When I attempted to Save my Excel Workbook after using the Copy() function, I received this error: ERROR - Unable to…
Chris
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What are my options for C++ DLL to call a C# DLL?

I have a C++ DLL that needs to call a function (pass a value, return a value) in a C# class library. Is my only option to give the C# DLL a COM interface and call it from C++ with IDispatch? Is this the best method?
Jason
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How do I get the ProgID of a COM component from C#?

I have an application that is written in C# I want to display a list of COM components in a folder on the system with details about the component, initially the ProgID. Is there a way of interrogating a component from my C# code to find out the…
Alan
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Excel 2010 interop defining in-line XML Styles

In .net you can create excel sheets programmatically. You can define a style like this: And assign that style to a cell.
Houman
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Read data from Excel files

I'm having some trouble reading from an Excel spreadsheet in C#. I have this code which I read every cell from A to X. System.Array myvalues; string[] strArray; Microsoft.Office.Interop.Excel.Range range = worksheet.get_Range("A" +…
Vlasin
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Get hWnd for XAML control in Windows 8 (Metro) app?

I need to pass a hwnd to a native dll that is going to write raw video to the frame. In WPF this works because you can get a hwnd reference from a control. Is this possible in a Metro app?
Kellen
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wcf Interop: No timestamp is available in security header to do replay detection

I am trying to call a Java service using WCF. The service sends a message back but it does not make back to my program. WCF generates: No Timestamp is available in security header to do replay detection. I captured the returned message in Fiddler…
KeithMacCrimmon
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In which cases should parameters be pinned when performing a P/Invoke call

I have a DLL from which I need to P/Invoke the following C method: int DAOpen(HANDLE *hOpen, UNIT *flags, void *callback, char *userData) I've come up with the following C# signature: [DllImportAttribute("", EntryPoint="DAOpen")] …
XenoAce
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How to build a 64-bit .NET DLL, with 64-bit COM interop?

I need to build a managed DLL, targeted for x64, and expose it via x64 COM. I need a walk through, good article, etc... Interop is fairly straightforward, but when you talk about x64 on both sides, I can't find anything.
Jason
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In VB6, how do I call a COM object requiring a pointer to an object?

I'm having trouble with a .NET Assembly that is com visible, and calling certain methods from VB6. What I have found is that if the parameters are well defined types, (e.g. string), calls work fine. If they are higher level objects, it raises a…
dermdaly
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Is it possible to return a LPWSTR from C++ DLL to C# app

The C++ function definition is this __declspec(dllexport) LPWSTR __stdcall GetErrorString(int errCode); And I call it in C# like this [DllImport("DLLTest.dll")] public static extern string GetErrorString(int errCode); static void Main(string[]…
Bill Walton
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From C++ wchar_t to C# char via socket

I am currently building a C++ application that communicate via socket to a C# application. My C++ app sends wchar_t* via socket. Here is an overview of what is send :