A VC++ wrapper DLL

See more:

C++

DLL

I have a third party DLL (including a Visual C++ Express project with source code) that is, I think, unmanaged. I Want to write a Managed C++ wrapper DLL so I can use the DLL from VB.

I have not touched C for about 15 years - most of my 'playing' has been in VB.

I have C++ and VB 2010 express.

I have created a new C++ Class Library and added some code to the header file (see below).

The code compiles. From VB I can see my property, but the two functions (WrapiguanaClose and WrapiguaneCode) are not visible. There will be several more properties and functions added once I can get the basics working.

It is probably a silly mistake - showing how out of date I am with C++.

Could anyone please tell me where I have gone wrong ?

// iguanaIRDLLWrapper.h

#pragma once
// #pragma comment(lib, "iguanaIRDLLWrapper.lib")
#include "Stdafx.h"
#include "iguanaIR.h"
#include "resource.h"

using namespace System;
using namespace System::Reflection;
using namespace System::Windows::Forms;

namespace iguanaIRDLLWrapper {

	public ref class igWrap
	{
		// TODO: Add your methods for this class here.
public:
    property int Version
    {
        int get()
        {
            return 1;
        }
        
       /* void set(int x)
        {
            _StudRank = x;
        }*/
    }


	// void WrapiguanaIRClose(PIPE_PTR connection);
	// void WrapiguanaIRCode(const iguanaPacket pkt);
 
	public : void WrapiguanaClose(PIPE_PTR connection)
	    /*      void iguanaClose(PIPE_PTR connection)  */

{
	typedef int (__cdecl *igClosePROC)(HANDLE);

	HINSTANCE hinstLib; 
    igClosePROC ProcAdd; 
    BOOL fFreeResult, fRunTimeLinkSuccess = FALSE; 
 
    // Get a handle to the DLL module.
 
    hinstLib = LoadLibrary(TEXT("iguanaIR.dll")); 
 
    // If the handle is valid, try to get the function address.
 
    if (hinstLib != NULL) 
    { 
        ProcAdd = (igClosePROC) GetProcAddress(hinstLib, "iguanaClose"); 
 
        // If the function address is valid, call the function.
 
        if (NULL != ProcAdd) 
        {
            fRunTimeLinkSuccess = TRUE;
            (ProcAdd) (connection); 
        }
        // Free the DLL module.
 
        fFreeResult = FreeLibrary(hinstLib); 
    } 
 }

	public : void WrapiguanaCode(const iguanaPacket pkt)
	    /*      unsigned char iguanaCode(const iguanaPacket pkt)  */

{
	typedef int (__cdecl *igCodePROC)(iguanaPacket);

	HINSTANCE hinstLib; 
    igCodePROC ProcAdd; 
    BOOL fFreeResult, fRunTimeLinkSuccess = FALSE; 
 
    // Get a handle to the DLL module.
 
    hinstLib = LoadLibrary(TEXT("iguanaIR.dll")); 
 
    // If the handle is valid, try to get the function address.
 
    if (hinstLib != NULL) 
    { 
        ProcAdd = (igCodePROC) GetProcAddress(hinstLib, "iguanaClose"); 
 
        // If the function address is valid, call the function.
 
        if (NULL != ProcAdd) 
        {
            fRunTimeLinkSuccess = TRUE;
            (ProcAdd) (pkt); 
        }
        // Free the DLL module.
	}
}
	};
}

Thanks in advance for any help.

John Hadley