Dll Import : Unable to find Entry Point "fnMultiply" in DLL "ImportDLL"
- by user662285
I am trying to use DLLImport for using Win32 dll method in C#.
Win32 dll C++
// .h file
#ifdef IMPORTDLL_EXPORTS
#define IMPORTDLL_API __declspec(dllexport)
#else
#define IMPORTDLL_API __declspec(dllimport)
#endif
// This class is exported from the ImportDLL.dll
class IMPORTDLL_API CImportDLL {
public:
CImportDLL(void);
// TODO: add your methods here.
int Add(int a , int b);
};
extern IMPORTDLL_API int nImportDLL;
IMPORTDLL_API int fnImportDLL(void);
IMPORTDLL_API int fnMultiply(int a,int b);
// .cpp file
// ImportDLL.cpp : Defines the exported functions for the DLL application.
//
#include "stdafx.h"
#include "ImportDLL.h"
// This is an example of an exported variable
IMPORTDLL_API int nImportDLL=0;
// This is an example of an exported function.
IMPORTDLL_API int fnImportDLL(void)
{
return 42;
}
IMPORTDLL_API int fnMultiply(int a , int b)
{
return (a*b);
}
Once i build this i get ImportDLL.dll
Now i create Windows Application and add this dll in debug folder and try to use this method using DLLImport
[DllImport("ImportDLL.dll")]
public static extern int fnMultiply(int a, int b);
And I try to call this in C#
int a = fnMultiply(5, 6); // This line gives error Unable to find an entry point
Can any body tell what i am missing?
Thanks.
