Comments by fisadmaster (Top 22 by date)

But if I pass TheClass to the form I can not see it and declare it from C ++?

I'm sorry but I'm lost, BimObjectCSharpClass is the namespace and the class is TheClass. which I have referenced in the button code to access LogMsg, the form have the same namespace:

the form has a button which in the click event has this code:

I have done a test without showing the form and the function works, the return call sends the message, but what I need is to send several messages while the form is displayed

Now you can see the complete code I have published for C++ and C#, the code of the button that should send the message of the release is:
TheClass myClass = new TheClass ();
myClass.LogMsg ("Work !!!");

with the debug the C # form is not shown, the form is show on released but the callback function is not executed. My configuration is for 64 bits

Check the changes but nothing happens, not return to C++

I try that too, same problem

Thanks for the code but the part,
_CPPCallBack = (CPPCallBack) .Marshal.GetDelegateForFunctionPointer (
                      cppCallBack,
                      typeof (CPPCallBack));

shows me the error: CSharpCom.CPPCallBack is a type which is not valid in the given context and CSharpCom.CPPCallBack does not contain a definition for 'Marshal'

I have included your code in the question so you can see the side of C # implemented
Any idea?

I have corrected the code but when I run the callback function it gives me an ECall security error

That is the reason that I am asking how to adjust the code, the original code is not mine, but it has been useful for me before making bridges. If you are so kind could you show me how to correct the statements?

I really know what I need, what I have asked is how to achieve it? The article does not show a conversion that satisfies the question made here.

Thanks for the data, but the article is for C++ to C++ not C++ to C#.

Thanks for the comment but, I need the opposite of what is described in your article, I need to load a C # dll that shows a form and when clicking the button located in this form, an integer must be sent back to the C ++ application that has loaded the C # library and esdta should show the result in the console (I think it is callback from C ++ to C #).

You import the functions of C ++ to a C # application, I need to react from C # to unmanaged C ++

You are right with C++/CLI code, But, I have already done a lot of examples but they are all of the static type, a call to a function in the C# library and a return value, but no example of how to expect a dynamic response, that is, more once for each execution, like a listener from unmanaged C++

@Richard MacCutchan, the requirement is established in this way because it needs to perform different operations between an unmanaged C++ application and a library in C# and it is necessary to test the interoperability between languages for future implementations