🚀 go-pugleaf

I have a DLL written in C++ and I need to pass it a delegate so that it
can call me back. The DLL has been around for a while and it takes
commands using a structure to contain input and output data. Callbacks
are passed to it in 'void *' pointers members.

I can't work out how to do the final assignment in C#.

If I try to just code the assignment:

  fsCmd.Value_VOIDS_2=TheProgressCB;

I get "[C# Error] SDL_FileSystem.cs(116): Cannot implicitly convert
type 'SDL.TCBProgress' to 'void*'" which doesn't really surprise me.

The declarations are:

  unsafe public delegate int TCBProgress( uint    MaxValue,
                                          uint    NowValue,
                                          sbyte * Message );

and fsCmd.Value_VOIDS_2 is 'void *'.

The only solution I've come up with so far seems a little silly and
that's to add a function to our DLL that takes a delegate and a void *
by reference then performs the assignment and returns. Surely there's a
way of performing that assignment using C#?
-- 
Andrue Cope [TeamB]
[Bicester, Uk]
http://info.borland.com/newsgroups/guide.html