Hi,
   Tried searching Google on this topic but not many came up.  Basically I
have a C# GUI client that wants to receive 'notifications' from a worker DLL
(which is implemented in C++/CLI).  So far, from C# I am able to call any
method directly in C++/CLI DLL.  But I would like to have the C++/CLI invoke
some callback methods from within C# (some event notifications so that the
GUI updates its UI).
   In the old days using C/C++, I could do this easily by passing a class
object ptr to the DLL and have it invoke callback methods declared in that
class.  Can I do the same thing in .NET?  Since there is no header file, I
don't know how to 'tell' the C++/CLI component which C# callback methods to
use.  Thanks.