Hey! I am just elaborating my previous article of this forum to giving intention to bargainer for learning Interoperability between C++ and C#.
from our previous article we learned the the .NET Framework (pronounced dot net) is a software framework that runs primarily on Microsoft Windows. It includes a large library and supports several programming languages which allows language interoperability (each language can use code written in other languages). Programs written for the .NET Framework execute in a software environment (as contrasted to hardware environment), known as the Common Language Runtime (CLR), an application virtual machine that provides important services such as security, memory management, and exception handling. The class library and the CLR together constitute the .NET Framework.
How to make Interoprebility between C++ and C#
here I am going to create a simple .dll using vc++ languages for simple arithmetic calculation of two parameter. and then calling these .dll using C# code to display the accomplishment of Interoperability feature.
How to design vb.Net code
Follow the procedure step by step to design dll using vb.net
when you press OK button next you will get an welcome to Win32 Application Wizard then click on Next button as given below :-
It will open an Application Setting Wizard window. here you need to do minor changes. like you need to select dll from "Application Type" and Empty project from "Additional options" as given below Images
From -
To -
Now you are ready to create dll using vc++ language. to create dll you need to crate a file with .cpp extension. follow the given step to create a .cpp extension file.
It will open Add new Item. here you need to select C++ File(.cpp) and then need to write a file name as Cmdll.
Now given code is used to create dll which will responsible to return arithmetic output based on two number.
#include
extern "C"
{
__declspec(dllexport) int Add(int x,int y)
{
return x+y;
}
}
extern "C"
{
__declspec(dllexport) int Sub(int x,int y)
{
return x-y;
}
}
Now Design C# program for using dll created in C++ languages.
to design C# program you can take help from previous article from
there.
you need to use using InteropServices namespace to excess dll written in C++ languages. take a look at below program to learn how to use dll for accomplishment of Interoperability.
using System.Runtime.InteropServices;
and then write below code
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
namespace PrgrmIntroprblty2
{
class Program
{
// Code will show Interoperability between VC++ and VC#
[DllImport("Cmdll.dll")]
public static extern int Add(int x, int y);
[DllImport("Cmdll.dll")]
public static extern int Sub(int x, int y);
public static void Display(int res, string condition)
{
Console.WriteLine("The " + condition + " of two number is : " + res);
}
static void Main(string[] args)
{
char ch;
do
{
Console.WriteLine("Enter Your Option");
Console.WriteLine("1 For Addition");
Console.WriteLine("2 For Substraction");
Console.WriteLine("----------------------------------------------------");
Console.WriteLine("Enter your Option");
int op = int.Parse(Console.ReadLine());
Console.WriteLine("----------------------------------------------------");
Console.WriteLine("Enter the First Value");
int n1 = int.Parse(Console.ReadLine());
Console.WriteLine("Enter the First Value");
int n2 = int.Parse(Console.ReadLine());
Console.WriteLine("----------------------------------------------------");
switch (op)
{
case 1:
Display(Add(n1,n2), "Addition"); // Here Add(n1,n2) is function written in VC++
break;
case 2:
Display(Sub(n1, n2), "Substraction");
break;
default:
Console.WriteLine("Invalid Option Try again...");
break;
}
Console.WriteLine("Do you want to Carry On...if Yes press Y");
ch = char.Parse(Console.ReadLine());
Console.WriteLine("\n");
}
while (ch == 'y' || ch == 'Y');
Console.ReadLine();
}
}
}from given code you can see how we are able to see the function written from c++ languages to C# languages. its all happen just because of Interoperability supported by .Net framework.
Now Finally run program to get the output as given below
.
highlighting same concept between vb.net and C#.