Full duplex operation, functions C++ C#

Question

I have a C# application and a C++ application. Between the two, data should now be exchanged.

In C# 
   ReceiveDataFromCPP(String data)    
   SendDatatoCPP(string data)       
   
In C++ 
   ReceiveDataFromCSharp(String data)
   SendDatatoCSharp(string data)      

  How can I achieve this?    I think I need CLI.       
Can you give me an example?  

I don't know when who sends what, it's event-oriented.

Picture, overview

Answer 1

Hi,

Windows Message, you can refer to the sample:
https://learn.microsoft.com/en-us/windows/win32/dataxchg/using-data-copy

The following example demonstrates how to send information between two applications using the WM_COPYDATA message.

For named pipes, check sample: How to: Use Named Pipes for Network Interprocess Communication

Using Pipes

Best regards,

Minxin Yu

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Answer 2

@Noah Aas I put together a sample that demonstrates using WM_COPYDATA to transfer strings between two different processes. The sample was created with VS2022 and includes an MFC C++ application and two C# Winforms applications (.Net Framework 4.8 and .Net 8). The sample applications transfer unicode strings (UTF-16LE) so do not change character encodings without making the appropriate changes to the sample code. The samples use a registered windows message to broadcast their process id and main window handle when they start up. So they can be started in any order. These samples were written so that only two processes can communicate with each other.

You can get the samples from https://1drv.ms/u/c/c389bf4121acea69/EfJ-SJJqXI9Fk2LruNlkr4oBjXrHT1q9skW_Y1dUe92_cg?e=NXaucj Don't forget to unblock the zip file before extracting the contents.