Getting An unhandled exception of type 'System.EntryPointNotFoundException'

[gyanendar]

Hi ,

I am trying to call a method from unmanaged DLL in my C# client application.
I am getting this exception "An unhandled exception of type 'System.EntryPo intNotFoundExce ption' occurred in DLLInjection.ex e"

My C# Client code:

public class ImportedFunction
    {
       [DllImport("C:\\CPP Project\\DLLInjection\\Debug\\Win32DLL.dll")]
       public static extern int GetStorageName();

    }

In Main()

Console.Write("Calling Imported Function...");
            
            int k=ImportedFunction.GetStorageName();

IN C++ file.

#define DllExport   __declspec( dllexport)


extern "C" DllExport int __stdcall
 GetStorageName();

// dllmain.cpp : Defines the entry point for the DLL application.
#include "stdafx.h"
#include "dllmain.h"
#include<Windows.h>

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					 )
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
	case DLL_THREAD_ATTACH:
	case DLL_THREAD_DETACH:
	case DLL_PROCESS_DETACH:
		break;
	}
	return TRUE;
}


int __stdcall GetStorageName()
{
	return 100;
}

Please help

[Paul Johnson]

Is it actually doing the import?

[gyanendar]

Yes ...I m trying to import the function from DLL(written in C++)

[Paul Johnson]

Bit of a misunderstandin g.

You're trying to import a DLL. Have you checked that the import is actually happening? (by the looks of it, the binary cannot find the imported dll)

[bvrwoo]

Does your dll have a .def file? Linking the DLL (plus .H and .LIB) in a C++ project does not need .def if using __declspec(dlle xport) before the function, but it does with C#/VB.NET.