[Solved] COM interface to CANoe

NicuPopescu

bq. How can I link to ole32.lib in Qt? I doesn’t find it on my PC. Only the ole32.dll….

i.e. here is in C:\Program Files\Microsoft SDKs\Windows\v7.0A\Lib\
better to copy it locally to your project in a "lib" folder and have in .pro file

@LIBS += ../lib/ole32.lib@

bq. What do you mean with the possible CoCreateInstance() results? Do you mean the error code saved in HRESULT result?

yes

L.E. I checked your initial code and it works ...

? Offline

[quote author="NicuPopescu" date="1386863709"]i.e. here is in C:\Program Files\Microsoft SDKs\Windows\v7.0A\Lib\ better to copy it locally to your project in a "lib" folder and have in .pro file [/quote]

I tried to add the library to my project:

I copied the Ole32.Lib out of the Microsoft SDK folder to my project directory
Then I added the following code to my pro file:

@
LIBS += C:/QtProject/3com_interface/libs/Ole32.Lib
@

But I get actually the same error:

"undefined reference to '_GUID const& __mingw_uuidof<IApplication>()'

Do I need some files more, for example the Ole32.dll?

But I'm wondering that my code works correctly in your project. Could you post your code or your project so I can search for the differences?

? Offline

Any ideas?

I have still the same problem: How can I get the IID of a COM-Application to create the COM interface?

There are two possibilities:

Is there an alternative to __uuidof() to get the IID of the object?
What do I need to add to my project, so I can use __uuidof() and how can I add this?

Thank you for all answers so far!

NicuPopescu

bq. Do I need some files more, for example the Ole32.dll?

dll will be found in system32, so no worry

I don't know why it is so difficult for you to get the project compiled; just in case I paste exactly what I have in main window project:

.pro file:

@#-------------------------------------------------

Project created by QtCreator 2013-12-13T16:39:39

#-------------------------------------------------

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = TestCANoeCOM
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui

LIBS += ../TestCANoeCOM/lib/ole32.lib@

path in LIBS depends on your projetc build directory in QtCreator's Projects panel

in mainwindow.cpp

@#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>

#include "C:\Program Files\Vector CANoe 7.5\Exec32\COMdev\canoe.h"

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);

IApplication* pIApp;
HRESULT result;

result = CoInitialize(NULL);

CLSID clsid;
result = CLSIDFromProgID(L"CANoe.Application", &clsid);

if(SUCCEEDED(result))
{
    qDebug() << "CLSID saved";
}

const IID IID_IApplication = __uuidof(IApplication);

result = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER, IID_IApplication, (void**) &pIApp);

if(SUCCEEDED(result))
{
    qDebug() << "Connection established";
}

}

MainWindow::~MainWindow()
{
delete ui;
}
@

nothing different to your first code ...

bq. How can I get the IID of a COM-Application to create the COM interface?

in registry HKEY_CLASSES_ROOT->PID (i.e CANoe.Application)->CLSID(Value)

and in HKEY_CLASSES_ROOT->CLSID->Value(found above)->InprocServer32 , you can find more info on COM server registration like:
LocalServer32=path to exe, ocx, dll into which your COM implementation resides

hope it helps! :)

? Offline

Hello NicuPopescu,

I've found my mistake. Thank you for posting your code. You've helped me a lot!

NicuPopescu

you're welcome! :)

hope the answers help other fellows here ...

haythem

HI

haythem

This post is deleted!

? Offline

I want to call a function from QT application in facet this function exist a CAPL script runing in Canalyzer I am using COM to get access to the function here my exemple but it doesnt work where is the problem any help plz

this my code:

ICAPL *pcapl;

ICAPLFunction *fn ;
 IApplication* pIApp;


HRESULT result,result1,result2, hresult,result3,result4,hr;
 IDispatch*CaplDisp,*CaplFn;
WCHAR * szMember = L"Multiply";
 DISPID dispid;
  DISPPARAMS dispparams = {NULL, NULL, 0, 0};
    EXCEPINFO excepinfo;
      UINT nArgErr;
   CLSID clsid;



 result = CLSIDFromProgID(L"CANalyzer.Application", &clsid);
   const  IID IID_CAPL =__uuidof(ICAPL);

    const  IID IID_CAPLFUNCTION =__uuidof(ICAPLFunction);
     const IID IID_IApplication =__uuidof(IApplication);

   result = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER, IID_IApplication, (void**) &pIApp);


   result1=pIApp->get_CAPL(&CaplDisp);

               qDebug() << "Result_get_CAPL "<<result1 ;


   result2=CaplDisp->QueryInterface(IID_CAPL,(void**)&pcapl);
    qDebug() << "result2 "<<result2 ;


  VARIANT varResult;


  hr = CaplDisp->GetIDsOfNames(IID_CAPLFUNCTION, &szMember, 1, CLSCTX_LOCAL_SERVER, &dispid);
    qDebug() << "hr"<<hr ;
    if (SUCCEEDED(hr)) {
hr = CaplDisp->Invoke(1,IID_CAPL, CLSCTX_LOCAL_SERVER,DISPATCH_METHOD,&dispparams, &varResult, NULL, NULL);
    }

Anis07

@la-ga
hi can you tell us what was the problem ?