// CallDllFunction.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

using namespace std;

// Defining the function prototype.
typedef double (__cdecl *AddType)(double a, double b);

int main()
{
	HINSTANCE dllHandle = NULL;
	AddType AddPtr = NULL;
	double result = 0.0;

	// Load the dll.
	dllHandle = LoadLibrary(L"MathLibrary.dll");
	if (dllHandle == NULL) {
		cerr << "Failed to load library with error code " << GetLastError() << endl;
		return EXIT_FAILURE;
	}

	// Get a pointer to the add function in MathLibrary.dll.
	AddPtr = (AddType) GetProcAddress(dllHandle, "?Add@Functions@MathLibrary@@SANNN@Z");
	if (AddPtr == NULL) {
		cerr << "Could not find add function. Error code " << GetLastError() << endl;
		return EXIT_FAILURE;
	}

	// The moment of truth...
	result = AddPtr(1.0, 2.0);
	cout << "The result is " << result << endl;

    return EXIT_SUCCESS;
}