I have no trouble passing __delegate ptrs to native C functions in DLLs,
however when attempting to pass the __delegate ptr to a native C++ function
in a DLL I get the following runtime exception: An unhandled exception of
type 'System.EntryPointNotFoundException'.  

This is confusing b/c if the entry point was not found, I would think I'd
get an unresolved symbol error during linking.  Furthermore, I can
successfully pass void, int *, and function pointers, etc to C++ DLL
functions, but this error persists when attempting to pass a __delegate
pointer, which is used for callbacks to managed C++ functions.

Here is the relevant code snippet - the DLL code simply contains stubs of
the functions called here:

#include "stdafx.h"
#using <mscorlib.dll>

using namespace System;
using namespace System::Runtime::InteropServices;

__delegate void testCB();
[DllImport("unmdll.dll")]
void fnunmdll_2(testCB *UpdateProgMeter);

int fnunmdll_0(void);
void fnunmdll_1(int *x);//testCB *UpdateProgMeter);

__gc class C1
{
public:
    static void handleCB()
    {   
        return;
    }
};

int _tmain()
{
      int k = 9;

       //always works (as both C/C++)
    fnunmdll_0();

       //always works (as both C/C++)
    fnunmdll_1(&k);

    testCB *pCB = new testCB(0, &C1::handleCB);

       //if this is a C++ function expecting a function pointer, the
aforementioned error occurs.  If this is an extern "C" function, all is ok!
    fnunmdll_2(pCB);  

    return 0;
}

As crazy as it sounds, I'm beginning to think this is not possible to do
with native C++ functions.

Thanks in advance, George