This thread is for discussions of DeviceIoControl & USB using Managed C++ & C#.

hello,

i am trying to wrap an unmanaged C++ code to managed one so that i can use it within c#, and i am using IJW - "It Just Works" - method for that. In the code, there is a function which takes a "filename" as one of its arguments and the type of that is "char*". In the documents of msdn, "char*" is mapped to String[in] or StringBuilder[in,out] by marshaller. although i searched in the goggle, i couldnt find any kinds of simple-because I am not an experienced enough- sample code that uses IJW method. I found always the ones which uses PInvoke method.

Can you help me with marshalling "char*" type with IJW method by a simple sample code?

Thanks!

Be advised that there are bugs in this C++.

Firstly, there is a line of code that reads

(long *) &nBytes,

where nBytes is declared as an int. This will lead to a stack corruption whenever sizeof(int) != sizeof(long).

Secondly, buffers are allocated with new char [] but then are deleted with delete, not delete[]. This can lead to memory leaks.

Thank goodness for C#!

Hei!

You can not use IJW if you are programming with C#. You can use P/Invoke where you import unmanaged dll or to make a managed wrapper class in c++ and then write a class in C# to use unmanaged class.
You can only use IJW if you want to use unmanaged C++ class in you managed C++ class, but not in other .NET languages.