COM object + dll

Psy_Duck

Hello all. I need work with cardreader in QT using driver and dll. I just show you code at VS:

#include "stdafx.h"
#include <windows.h>
#include "Objbase.h"
#import "MifareDrv.dll" rename_namespace("mifare") 
CLSID clsid;
IDispatch *pWApp;
mifare::IMifareDrv *pMiDrv;
int _tmain(int argc, _TCHAR* argv[])
{
	HRESULT hr = CLSIDFromProgID(L"Addin.MifareDrv", &clsid);
	if (SUCCEEDED(hr))
	{
		LPOLESTR tmpbuf;
		StringFromCLSID(clsid, &tmpbuf);
		CoInitializeEx(NULL, COINIT_MULTITHREADED);
		hr = CoCreateInstance(clsid, NULL, CLSCTX_INPROC_SERVER, IID_IDispatch, (void **)&pWApp);
		hr = pWApp->QueryInterface(__uuidof(mifare::IMifareDrv), (void **)&pMiDrv);
		pMiDrv->FindDevice();
		pMiDrv->Connect();
		pMiDrv->BeepTone = 1;
		pMiDrv->PcdBeep();

	}
		return 0;
}

I rewriting this code for Qt but trying to stick to the original.
In pro. i write

LIBS += -lole32 -loleaut32 -luuid

in .cpp:

#include <QCoreApplication>
#include "windows.h"
#include "objbase.h"
#include <QLibrary>
CLSID clsid;
IDispatch *pWApp;
HRESULT hr = CLSIDFromProgID(L"Addin.MifareDrv", &clsid);
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QLibrary myLib ("MifareDrv.dll");
    myLib::IMifareDrv *pMiDrv;
    LPOLESTR tmpbuf;
    StringFromCLSID(clsid, &tmpbuf);
    CoInitializeEx(NULL, COINIT_MULTITHREADED);
    hr = CoCreateInstance(clsid, NULL, CLSCTX_INPROC_SERVER, IID_IDispatch, (void **)&pWApp);
    hr = pWApp->QueryInterface(QUuid(__uuidof(myLib::IMifareDrv)), (void **)&pMiDrv);

    return a.exec();
}

And yep, i have trouble with "myLib::IMifareDrv". Can anybody help me to write and how to replace me "#import"? Or how this code should look with QAxBase.

hskoglund

Hi, if you have the .tlb file for the MiFare driver, instead of #importing, you could try using Qt's dumpcpp utility
For a good example on how to use it, see here

Psy_Duck

@hskoglund I'm trying it. I create cpp and h, but when I wrote the code I got the next problem: "return type 'struct MifareLib::TSAMVersion' is incomplete
inline TSAMVersion MifareDrv::SAMVersion() const"
I find TSAMVersion, it struct has prototype, but hasn't realization.
Do you have any idea?

hskoglund

Hi, maybe that SAMVersion() function is not important, you could try commenting it out...

Psy_Duck

@hskoglund i decided to throw off their problem and the code here, can someone else help
#include <QApplication>
#include <QAxWidget>
QAxWidget *drvFR;
#define CLSID_DrvFR "{450E3DC0-5370-4007-BD5F-90827EC2C2D6}" // it's GUID for driver object (my Addin.MifareDrv). GUID can be found in registry
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
drvFR = new QAxWidget();
drvFR->setControl(CLSID_DrvFR);
drvFR->dynamicCall("FindDevice()");
drvFR->dynamicCall("Connect()");
drvFR->setProperty("BeepTone", 1);
drvFR->dynamicCall("PcdBeep()");
....
and of course in .pro write QT += axcontainer.

Thank you for trying help.

opengpu

the problem is solved or not?