Passing complex structure from C# to C++ and back

From: Ofir (ofirsh_at_hotmail.com)
Date: 02/26/04 

Date: 25 Feb 2004 16:55:04 -0800

Hi,

I am currently using an external C++ library using C++ code, and I
would like to continue using this library from C# code I am writing.I
do not have access to the sources of this library.
I was looking around, and most of the information I found deals with
simpler cases. I could hardly find any meterial regarding the pointer
to pointer structure, as in "prop **x".

My question is what data structure, marshaling or code do I have to
write in order to fill correctly the following data structure being
sent to the function and returned from it ?

The C++ structures are:

struct prop
{
  int i;
  double v;
}

struct container
{
  int l; // number of elements
  double *y;
  prop **x;
}

struct results
{
  prop **x;
}

The prototype of the function is:

results *compute( container *cont )

Thank you in advance,

Ofir

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