How to interact between C# and VC++ applications

[Mary Chennai]

I have a VC++ application(say MathApp) that does some mathematical calculations using some U/I inputs, and gives the results. I have a C# application(say ManagedApp) that wants to interact with MathApp. ManangedApp has to pass the inputs to MathApp, MathApp should perform the calculations, and give back the results to ManagedApp. Can someone suggest different ways to accomplish the above task?

[led mike]

Rinnu Mary wrote:

I have a VC++ application(say MathApp)

communicating between processes is a well known topic called Inter-Process Communication[^] However if the MathApp code is designed well the math routines would be separated from the user interface code and they can be built into a library that can then be used by other applications at compile time. This eliminates the need to have two processes involved at runtime and therefore eliminates the IPC scenario. After that it is a matter of dealing with the Native code to Managed code problem. This is where C++/CLI comes in. You can develop a .NET assembly (library) using C++/CLI that contains the C++ MathApp code as well as a managed class of your own design that encapsulates the native code. Once done C# projects can reference this assembly and use the managed class from it to execute the native code contained within the DLL (assembly).

[Lost User]

The easiest method would probably be using WM_COPYDATA Message[^]. Use WM_COPYDATA to send data to/from C++ and C# Windows processes[^] Best Wishes, -David Delaune