Hi Jeff,

Why not redefine the C++ structure in the C# which will save a lot of job
to do the interop.
Also here is a sample you may take a look.
[MCPP]
typedef struct TestSC
{
    int i;
    int j;
}SCC;

using namespace System;
using namespace System::Runtime::InteropServices;
namespace TestMCPPMC
{
    public __gc class TestClass
    {

    public:
        int i;
        int j;
        TestClass(Byte bts[])
        {
            SCC tx;
            IntPtr pTs=(IntPtr)&tx;
            Marshal::Copy(bts,0,pTs,sizeof(SCC));
            i = tx.i;
            j = tx.j;
        }
    };
}

[C#]
        [STAThread]
        static void Main(string[] args)
        {
            byte[] bts = new byte[8];
            bts[0] = 1;
            bts[4] = 1;
            TestMCPPMC.TestClass tc = new TestMCPPMC.TestClass(bts);
            System.Diagnostics.Debug.WriteLine(tc.i);
            System.Diagnostics.Debug.WriteLine(tc.j);
        }

Best regards,

Peter Huang
Microsoft Online Partner Support