Passing data between C++ (MFC) app and C#

Question

We have a monolithic MFC GUI app that is nearing the end of it\'s life in C++. We are planning to build new functionality in C# and pass data between each app.

Quest

Answer 1

Take your pick:

• files
• named pipes <-- My recommendation
• shared memory
• sockets
• COM
• Windows messages

Why named pipes?

• Gives you a FIFO way of working for free (like sockets, but not like shared memory)
• Can easily communicate both ways
• Well supported on all platforms
• Easy to use
• Reliable data passing and delivery
• Can be blocking and non blocking
• Can read data without removing (unlike sockets)
• Can be expanded to include a third app easily.

In .Net just use System.IO.Pipes.

In C++ use CreateNamedPipe and CreateFile.