Re: Using multiple programming languages - C++ & C#

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From: Olaf Baeyens (olaf.baeyens_at_skyscan.be)
Date: 10/19/04 

Date: Tue, 19 Oct 2004 15:34:26 +0200

> I am the only C++ developer in my office. The rest of the team now uses
C#.
> I want to be able to use some of the C# classes they have developed. I
know
> this is possible, but can only find the usual VB/C# examples.
>
> Can someone give me some clear instructions (or point me to an article) on
> how to use C# classes from a project that is primarily C++ managed
extensions?
>

Simple:
In your project add the C# dll under the "references" option.
Now add this somewhere in your project:
    #using <mscorlib.dll>

And now add the namespaces like this in the C++ code you wish to use
    using namespace System;
    using namespace CustomMadeDll;

And finally

Use the code like this:
    CustomMadeDll::TheClass __gc *sc=new CustomMadeDll::TheClass();
    TheClass->DoSomething();

You can safely use these classes in you unmanaged code.

One other thing: Strings must be something like this;
    System::String *m_sMyString=new System::String("test")

Converting System::String to normal string:

    System::String __gc *sCurrentComputer=sc->CurrentComputerName();
    string
sComputerName=LPCTSTR((char*)(void*)Marshal::StringToHGlobalAnsi(sCurrentCom
puter));

And the way around something like this.

    string sComputerName="abc";
    System::String __gc *sCurrentComputer=sComputerName.c_str();

Do not search for header files or lib files to include, since they do not
exist.
The header information is contained into the C# dlls and is available when
you add it to your "references" option.

I hope this helps. :-) 

-- 
http://www.skyscan.be

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