Hi,

I still try to implement a .Net wrapper to handel AVI Files. I'm unsing
managed C++ with VStudio 2003. The structure of my classes looks like this:

class AudioStream {
    ...
}

class VideoStream {
    ...
}

class AviFile {
    IAVIFile*     file_;
    AudioStream*  audio_;
    VideoStream*  video_;

  public:
    void Open(const char* path) {
        AVIFileOpen(&file_,path,OF_SHARED_DENY_WRITE,NULL);
        audio_ = new AudioStream();
        video_ = new VideoStream();
    }
}

audio_ and video_ are pointers to unmanaged classes and, according to
the documentation, are therefore implicit unmanaged pointers. But what
about file_?

The call to AVIFileOpen results in the error "'AVIFileOpenA' : cannot
convert parameter 1 from 'IAVIFile* __gc*' to 'PAVIFILE*'. AVIFileOpen
is a windows function defined in Vfw.h.

How do I have to define file_ to get my example working?

regards,
Achim