pass ADO Recordset from a managed to an unmanaged code

[stanley]

hello all,
1 - is it posiblle to pass ADO Recordset as a parameter from C++ managed
code (.Net MC++) to a C++ unmanaged code (the old existing code) function??
how can i do it using the P-Invoce mechanism?
if it's not posibble - how can i call an exisiting C++ unmanaged function
that expect me to pass a Recordset parameter???
2- the same question but i need to pass the unmanaged function an
IUnknown* parameter(hold the connection to the DB).

if u can show me an example it will be great
thank's
stan