just to clarify, this is the runtime definition in my "C" library header:

extern int SXInit (int, ...);

Paul

 Hi guys,

 I get the following error during runtime:

 Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object.
 at SXInit(Int32 )

 The SXInit method is a native C function I am calling from Managed C++ and the method is expecting a number of integers as
 parameters and the constants I am passing have been defined in the C library as "#define xxxx 2100".

 My questions are:

         1) Why do I see Int32 there?

         2) Are the "#define" statements converting themselves to Int32s?

 I would appreciate if there is a way around calling C functions and passing them "int" according to the native data type definition
 and not Int32 which is a C++ Managed Type since Int32 is an object.

 Please let me know

 Thanks
 Paul