dllimport Questions

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I have a project developed with .NET Core and C#, running on Docker, that has to call a few functions on a DLL developed with C++. The problem is: when I run my project without Docker, on Windows u...
Klotz asked 22/10, 2019 at 14:36

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A .NET application calls C dll. The C code allocates memory for a char array and returns this array as result. The .NET applications gets this result as a string. The C code: extern "C" __declspe...
Impatience asked 19/12, 2009 at 8:33

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I have external .DLL file with fast assembler code inside. What is the best way to call functions in this .DLL file to get best performance?
Gaylene asked 13/5, 2013 at 9:37

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how to load a dll in a c# project error: Unable to load DLL 'Reader.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E) code sample: [DllImport("Reader.dll")...
Cherrylchersonese asked 16/2, 2012 at 23:5

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Since OSVersion is now not reliable since Windows 10 has been released (this function reports Windows 8 for Windows 10), I'm attempting to use the new Version Helper API functions in my C# applicat...
Franfranc asked 21/7, 2015 at 22:5

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Assuming I have these two files: Header.h class DLL ExportClass{ public: ExportClass(); static int test; }; Source.cpp #ifdef EXPORT #define DLL __declspec(dllexport) #else #define DLL __d...
Febrifugal asked 12/11, 2013 at 10:32

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I have a solution in VS 2008 with 2 projects in it. One is a DLL written in C++ and the other is a simple C++ console application created from a blank project. I would like know how to call the fun...
Piceous asked 11/2, 2009 at 23:34

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I'm experimenting with Rust on Windows. My code declares and calls a function in an external library. The declaration is like this: #[link(name = "Rvea0326nc-64")] extern "C" { ...
Terylene asked 13/8, 2020 at 11:22

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I have a method I want to import from a DLL and it has a signature of: BOOL GetDriveLetter(OUT char* DriveLetter) I've tried [DllImport("mydll.dll")] public static extern bool GetDriveLetter(...
Eduino asked 2/4, 2010 at 18:35

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In a .NET Core application, I'm getting this error when I try to run my unit test project: System.DllNotFoundException: Unable to load DLL 'opencv_core246' or one of its dependencies: The specifie...
Sloane asked 19/3, 2020 at 5:19

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I'm new to C# and I'm trying to learn to usage of DLLs. I'm trying to wrap my objects in a DLL, and then use it in my program. public class Foo // its in the DLL { public void Bar() { SomeMethod...
Upgrade asked 15/2, 2011 at 23:58

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Hi I have a C# WinForm app, I am able to call functions from the libnetclient.dll via DllImport like below: [DllImport("libnetclient.dll", CharSet = CharSet.Auto)] public static extern int NETCLIE...
Towline asked 27/12, 2019 at 18:15

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I'm running a socket server on my server and I woke up to messages about its inaccessibility. It turns out that before I went to bed, I had selected text in the window. I forgot to hit Enter to res...
Shick asked 2/11, 2016 at 17:23

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I've created an DLL for my Console Application in Visual Studio. In my DLL I have a Class named Dialog_MainMenu with has a *.cpp file and a *.h file. Following error message: Error 9 error LNK2...
Carabin asked 27/7, 2013 at 20:4

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How do I unload a DLL which has been loaded using DllImport in C#?
Cowper asked 15/3, 2010 at 6:57

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I downloaded the "smilenet-1.2.1-win64-academic" library from this page and imported the smileNET.dll in my Unity project. Then I restarted my visual studio, and when I tried to use the library, it...
Pertain asked 27/2, 2019 at 5:31

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EDIT (the whole question, it was too unclear) I want to use OpenSSL.NET The OpenSSL.NET install instructions page: INSTALL Make sure you have libeay32.dll and ssleay32.dll in the current worki...
Blackstone asked 8/9, 2009 at 20:26

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I made a class library (.net framework) project in C# and I want to use that DLL on my C++ client project. I've checked on MSDN and online for instructions on how to I made it. So I could see C# c...
Lumpy asked 30/10, 2018 at 5:55

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Today, working on some VB.NET code I had to access two external DLLs in order to use some methods. The help topics that I found told me to use the following external methods: shlwapi.dll → PathIs...
Konstanz asked 4/10, 2018 at 9:52

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I have ActiveX VB6 DLL (have no access to its sources), and want to call method 'GetUnitInfo' I use to import it like: [DllImport(@"C:\Users\R\Documents\lab.dll")] public static extern long GetUn...
Poteat asked 27/9, 2018 at 15:37

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I've tried placing the basic dll's into unity's assets folder - Result: "blah blah will cause Unity to Crash Error." I've tried Manually adding references - Result: Unity refreshes its references ...
Deafening asked 28/8, 2018 at 5:49

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I am getting this weird error while trying to marshal data to my DLL function and back to the C# code. I don't see where I am passing null or reading invalid memory and this error is so vague. Any ...
Lanna asked 27/2, 2010 at 1:57

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I am working with unity for an iOS game. For unlocking achievement I need to access a "Achievement.mm" file from my c# code: [DllImport("__Internal")] private static extern void GKAchievement(s...
Corrientes asked 26/7, 2016 at 8:8

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How should I DLLImport things in VB.NET? An example would be: <DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _ Private Shared Function GetWindowText(ByVal hwnd As IntPt...
Propolis asked 9/2, 2010 at 14:34

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Okay one more function that it's not yet working. I am basically calling some C++ functions from C# by using P/Invoke. The problematic function does query a show laser device for some device relate...
Separatrix asked 2/5, 2018 at 15:41

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