Thread: Error C2664 - Trying to call an external Dll

I'm using Visual Studio 2005 on Windows. I was supplied a third party dll that I need to call from an MFC DLL that I'm creating.

I have a couple of questions.

1. General Question
The third party dll came with the dll named BB-CLOGP.DLL, a header file named clogp-dll.h and a folder named CLog P Data.
Here's how I set the project up:
Added clogp-dll.h in my project's main directory then added BB-CLOGP.DLL and the CLog P Data folder to the Debug folder where my dll is created when I compile the project. Does this sound correct?

2. Specific Errors
Here's the header file that came with the project:

Code:

// DH-20000401 moved RETURN_HANDLE define here
// DH-20000323 updated struct field sizes
// DH-19991005 initial version as per Kam Chana's specifications

// define this if verbose results desired, otherwise only the calculated
// value itself will be available to the calling function "CALCLOGP" which is imported around line 11 of my code

// struct for ClogP results
typedef struct {
	char Class[10];
	char Type[6];
	char Description[40];
	char Comment[10];
	float Value;
} LogPContribution;

// struct for CMR results
typedef struct {
	char flag[1];
	char atomType[3];
	float atomValue;
	int atomCount;
	char bondType[18];
	float bondValue;
	int bondCount;
} CMRContribution;

Here's my code that tries to call the dll. Specifically, I'm trying to
call the function CALCLOGP:

Code:

#include "stdafx.h"          // Standard MFC libraries
#include "cfx.h"          // CFX Custom Tag API

#include "clogp-dll.h"          // External CLogP DLL Header File

// macros
#define IMPORT extern "C" __declspec(dllimport)
#define LINE_LIMIT 2048

// import DLL functions
typedef long (CALCLOGP)(const char*, float*, long*, HANDLE*);
typedef long (CALCCMR)(const char*, float*);
typedef long (CALCXMR)(const char*, float*);
typedef long (CALCMGVOL)(const char*, float*);
typedef long (MOL_FILE_IMPORT) (char* inputF, char* outputF);
typedef double (CLOGP_VIA_MOL) (char* myMol);

static CALCLOGP* calcLogP = NULL;
static CALCCMR* calcCMR = NULL;
static CALCXMR* calcXMR = NULL;
static CALCMGVOL* calcMgVol = NULL;
static MOL_FILE_IMPORT* mol_file_import;
static CLOGP_VIA_MOL* clogp_via_mol;
static HINSTANCE hinstCLogP = NULL;
static HINSTANCE hinstCopy = NULL;

void ProcessTagRequest( CCFXRequest* pRequest ) 
{
     try
     {
        // Retrieve attributes passed to the tag          
        // For example: 
        //     LPCSTR lpszColor = pRequest->GetAttribute("COLOR") ;
          
		//Complete the import of the dll routines
		hinstCLogP = LoadLibrary("bb-clogp.dll");
		hinstCopy = hinstCopy;

		calcLogP = (CALCLOGP *) GetProcAddress(hinstCLogP, "calcLogP");
		calcCMR = (CALCCMR *) GetProcAddress(hinstCLogP, "calcCMR");
		calcXMR = (CALCXMR *) GetProcAddress(hinstCLogP, "calcXMR");
		calcMgVol = (CALCMGVOL *) GetProcAddress(hinstCLogP, "calcMgVol");
		mol_file_import = (MOL_FILE_IMPORT *) GetProcAddress(hinstCLogP, "mol_file_import");
		clogp_via_mol = (CLOGP_VIA_MOL *) GetProcAddress(hinstCLogP, "clogp_via_mol");	

		//Call the function to get the CLogP value

		float pLogP;
		long err;

		long pNumContrb;

		long smiles;


		// Note: These MUST be GlobalFree( ) 'd after calls to calcLogP
		LogPContribution** pClogPContrb, * pclogp;


		pLogP = -99.99f;
		pNumContrb = 0;

		err = calcLogP(smiles, &pLogP, &pNumContrb, &pClogPContrb);

		// smiles holds the smiles string of course.
		// pLogP will have your value if err is less than 60.

		// Later you must free as follows...
		//	GlobalFree(pClogPContrb);
		//	GlobalFree(pclogp);
		 
		 
		 // Write output back to the user here...
          pRequest->Write( "Hello from CFX_HELLOWORLD!" ) ;
          // Output optional debug info
          if ( pRequest->Debug() )
          {
               pRequest->WriteDebug( "Debug info..." ) ;
          }
     }
     // Catch Cold Fusion exceptions & re-raise them
     catch( CCFXException* e )
     {
          pRequest->ReThrowException( e ) ;
     }
     
     // Catch ALL other exceptions and throw them as 
     // Cold Fusion exceptions (DO NOT REMOVE! -- 
     // this prevents the server from crashing in 
     // case of an unexpected exception)
     catch( ... )
     {
          pRequest->ThrowException( 
               "Error occurred in tag CFX_HELLOWORLD",
               "Unexpected error occurred while processing tag." ) ;
     }
}

When I try to compile, I get errors regarding the parameters in the function call to
err = calcLogP(smiles, &pLogP, &pNumContrb, &pClogPContrb); This is called around line 63

The specific errors I get are:

Code:

c:\documents and settings\epajn\my documents\visual studio 2005\projects\cfx_clogp\request.cpp(70) : error C2664: 'CALCLOGP' : cannot convert parameter 4 from 'LogPContribution ***__w64 ' to 'HANDLE *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
c:\documents and settings\epajn\my documents\visual studio 2005\projects\cfx_clogp\request.cpp(70) : error C2664: 'CALCLOGP' : cannot convert parameter 3 from 'float *__w64 ' to 'long *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
c:\documents and settings\epajn\my documents\visual studio 2005\projects\cfx_clogp\request.cpp(70) : error C2664: 'CALCLOGP' : cannot convert parameter 1 from 'long *__w64 ' to 'const char *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
Generating Code...

Additionally, the instructions do not declare the variable in parameter 1 anywhere (smiles).

I'm assuming I can set it to a type of long

I've been struggling with this for awhile so help is greatly appreciated.