I posted the topic on another site and this was the response hhhhhh :'(
this sentence I wrote it in the site when he ask me what I tried : "actually I tried nothing just I will go to search in google"
So go. Do some research.
We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us to do it all for you.
So we need you to do the work, and we will help you when you get stuck. That doesn't mean we will give you a step by step solution you can hand in!
Start by explaining where you are at the moment, and what the next step in the process is. Then tell us what you have tried to get that next step working, and what happened when you did.
If you are having problems getting started at all, then this may help: How to Write Code to Solve a Problem, A Beginner's Guide[^]
You might have heard of the concept of 'software layers' with regard to software. The bottom layer with regard to Windows in terms of writing code for Windows is known as the Windows API (Application Programming Interface). Numerous programming languages can be used to call Windows Api functions. In terms of C or C++, one can call the Windows Api functions directly. One could write an entire program for Windows - either console or GUI (Graphical User Interface), with nothing else than these functions provided by Microsoft. However, most, by far the vast majority, of programs written for Windows, use additional 'layers' that sit on top of the raw API. One such layer everyone uses (nearly everyone, anyway) who use C or C++ are code libraries (binary components) containing the C and C++ Standard Library functions, for example, C's printf, or C++'s std::cout. These libraries form a 'layer' that sits on top of the Windows Api. Their internal implementation would involve calling lower level layer Windows Api functions.
The next layer up above all this would be the Microsoft .NET Application Framework. I believe C++/CLI coding involves interaction mostly or totally with that software 'layer'. I believe that's where you are at.