How to load DLL library on Labview?

Question

Hi
I have an application that is working well in Visual C++ 2012. I would like to load the dll library on labview and to execute the code on labview. I have only the DLL file, the working application and the help file. Is it possible to realise this task on labview using Call Library Function Node.
I have par example the following code in .cpp file:
void CMTBClientUsingCOMDlg:nBnClickedConnect()
// TODO: Add your control notification handler code here
try
// login to MTB, using english language
m_MTBConnection->Login(("en"), &m_ID);
// get MTB root (forcing an internal QueryInterface() on IMTBRoot!)
m_Root = (IUnknown*)(m_MTBConnection->GetRoot((BSTR)m_ID));
// ask root to return the number of devices
int count = m_Root->GetDeviceCount();
// list all devices
for (int i=0; i < count; i++)
_bstr_t name = ((IMTBIdentPtr)m_Root->GetDevice(i))->GetName();
m_ComboDevices.AddString(name);
if( m_ComboDevices.GetCount() > 0)
m_ComboDevices.SetCurSel(0);
OnCbnSelchangeDevices();
m_BtnConnect.EnableWindow(false);
m_BtnDisconnect.EnableWindow(true);
catch(_com_error e)
// connection close
OnBnClickedDisconnect();
DisplayError(&e);
How to execute this code on labview?
Best regards

Answer 1

Hi
I have attached the help file describing the dll library (MTBApi.dll). My working program made on Visual C++ Dot Net is very big and therefore I can’t attach it.
In my header file I import at the beginning the dll library on this way:
 #import "MTBApi.tlb" named_guids
using namespace MTBApi;
Than I have a class:
class CMTBClientUsingCOMDlg : public CDialogEx
public:
CMTBClientUsingCOMDlg(CWnd* pParent = NULL); // standard constructor
~CMTBClientUsingCOMDlg(); // standard destructor
enum { IDD = IDD_MTBCLIENTUSINGCOM_DIALOG };
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
protected:
HICON m_hIcon;
IMTBConnectionPtr m_MTBConnection;
IMTBRootPtr m_Root; 
CComBSTR m_ID; 
IMTBChangerPtr m_Changer; 
IMTBDevicePtr m_Device;
DECLARE_MESSAGE_MAP()
public:
afx_msg void OnBnClickedConnect();
CButton m_BtnConnect;
In my .cpp file I have:
CMTBClientUsingCOMDlg::CMTBClientUsingCOMDlg(CWnd* pParent /*=NULL*/)
: CDialogEx(CMTBClientUsingCOMDlg::IDD, pParent)
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
CoInitialize(NULL);
try
// create an instance of the connection class which can connect to the server
m_MTBConnection = IMTBConnectionPtr(CLSID_MTBConnection);
catch(_com_error e)
CMTBClientUsingCOMDlg::~CMTBClientUsingCOMDlg()
void CMTBClientUsingCOMDlg:isplayError(_com_error* e)
void CMTBClientUsingCOMDlg:oDataExchange(CDataExchange* pDX)
CDialogEx:oDataExchange(pDX);
DDX_Control(pDX, IDC_CONNECT, m_BtnConnect);
BEGIN_MESSAGE_MAP(CMTBClientUsingCOMDlg, CDialogEx)
ON_BN_CLICKED(IDC_CONNECT, &CMTBClientUsingCOMDlg:nBnClickedConnect)
END_MESSAGE_MAP()
BOOL CMTBClientUsingCOMDlg:nInitDialog()
CDialogEx:nInitDialog();
void CMTBClientUsingCOMDlg:nPaint()
void CMTBClientUsingCOMDlg:nBnClickedConnect()
try
// login to MTB, using english language
m_MTBConnection->Login(("en"), &m_ID);
// get MTB root (forcing an internal QueryInterface() on IMTBRoot!)
m_Root = (IUnknown*)(m_MTBConnection->GetRoot((BSTR)m_ID));
// ask root to return the number of devices
int count = m_Root->GetDeviceCount();
// list all devices
for (int i=0; i < count; i++)
_bstr_t name = ((IMTBIdentPtr)m_Root->GetDevice(i))->GetName();
catch(_com_error e)
// connection close
My question is how to start this code in labview. How to write the function in labview, par example this function:
m_MTBConnection->Login(("en"), &m_ID);
Best regards
Attachments:
MTBApi.zip ‏1935 KB