dllimport

I have written a C DLL and some C# code to test including this DLL and executing functions from it. I am not too familiar with this process, and am receiving a PInvokeStackImbalance exception whenever my DLL function is called from the C# source code. The code is as follows (I have commented most code out to isolate this problem): C# Inclusion code: using System; using System.Runtime.InteropServices; using System.IO; namespace TestConsoleGrids { class Program { [DllImport("LibNonthreaded.dll", EntryPoint = "process")] public unsafe static extern void process( long high, long low); static void

I am developing on a 64-bit Windows 7 box with Visual Studio 2012 (11.0.51106.01 Update 1). I have a Support project that compiles some C code into a (32-bit) DLL. In my header I have: #define RET_TYPE(type) _declspec(dllexport) type __stdcall RET_TYPE(int) test_dll_call(int invar); In my C file I have: RET_TYPE(int) test_dll_call(int invar) { int retVal = 4 * invar; return retVal; } I also have a (32-bit) WPF C# application that loads the DLL inside of a class as follows: [DllImport("MyDll.dll", CharSet = CharSet.Ansi, BestFitMapping = true, ThrowOnUnmappableChar = true)] public static extern

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? Your DLL might be in python or c++, whatever , do the same as follow. This is your DLL file in C++. header: extern "C" __declspec(dllexport) int MultiplyByTen(int numberToMultiply); Source code file #include "DynamicDLLToCall.h" int MultiplyByTen(int numberToMultiply) { int returnValue = numberToMultiply * 10; return returnValue; } Take a look at the following C# code: static class NativeMethods { [DllImport("kernel32.dll")] public static extern IntPtr

A quick question: When declaring the DLLImport Attribute in .Net, where does the runtime look to resolve that DLL dependency? Would I have to dump the DLL and all of its dependencies in the bin folder? Martin I think it is working like LoadLibrary. Maybe Windows path searching in LoadLibrary with manifest will be helpfull. Edit Dynamic-Link Library Search Order is probably what you want. Generally, you'd expect it to look at whatever's defined in the user's Path. To find out what this contains, from a command prompt, type echo %PATH% [Enter] 来源： https://stackoverflow.com/questions/268627/where

I've seen a couple of examples such as this: [DllImport("user32.dll")] static extern bool TranslateMessage([In] ref Message lpMsg); [DllImport("user32.dll")] static extern IntPtr DispatchMessage([In] ref Message lpmsg); But, what I don't understand is why someone would do that as apposed to just referencing the DLL like they do other libraries? The MSDN states: "The DllImport attribute is very useful when reusing existing unmanaged code in a managed application. For instance, your managed application might need to make calls to the unmanaged WIN32 API." But, is that saying it is not useful to

This question already has an answer here: Marshal an array of strings from C# to C code using p/invoke 3 answers C# call C++ DLL passing pointer-to-pointer argument 3 answers I need to pass an argument to an unsafe DllImported function in the form of: [DllImport("third_party.dll")] private static extern unsafe int start(int argc, char** argv); I'm assuming it's an array of strings. However when I try to do the following, I get 'Cannot convert from string[] to char**' error. How do I go about getting this to work? Thanks. string[] argv = new string[] { }; start(0, argv); EDIT 1: The question

Do you know a soft which automatically generates C# code (with [DllImport] attributes in .cs) from a native DLL in order to use this DLL in a C# code? Checkout the P/Invoke Interop Assistant : In marshalling, there are a bunch of attributes and rules. Understanding all those attributes and rules seem a bit daunting. In order to make developing work more efficient and easier on those attributes and the rules, P/Invoke Interop Assistant comes out. It is a toolkit that helps developers to efficiently convert from C to managed P/Invoke signatures or verse visa. This is conceptually similar to