Connecting to COM object: requested control could not be instantiated



  • Hello!

    Please, help me with connecting QT programm to COM object.

    COM object:

    I have registered .dll - Sh4Ole.dll using

    regsrv32 Sh4Ole.dll
    

    Info from registry:

    GUID = {AF5496E4-4D18-4932-A422-4C778BF11053}
    typelib = {95456CCB-659C-438A-8B48-C1637422941F}
    Name = Sh4Ole.SH4App
    

    My code:

    
    #include <QtCore/QCoreApplication>
    #include <ActiveQt\QAxBase.h>
    #include <ActiveQt\QAxObject.h>
    #include <ActiveQt\QAxBase.h>
    #include <QDebug>
    
    #include "SH.h"
    //#import "D:\\Sh4Ole.dll"
    
    using namespace Sh4Ole;
    
    int main(int argc, char *argv[])
    {
    	QCoreApplication a(argc, argv);
    
    	ISH4Ole* ole = new ISH4Ole();
    	qDebug() << ole->setControl("{AF5496E4-4D18-4932-A422-4C778BF11053}");
    	qDebug() << ole->SetServerName("SDBSERV:pTa3t1000");
    	qDebug() << ole->DBLoginEx("Admin", "");
    	qDebug() << ole->DBConnected();
    	qDebug() << ole->GetDBVersion();
    	system("pause");
    	ole->DBLogout();
    	if (ole != Q_NULLPTR)
    		ole->deleteLater();
    	return a.exec();
    }
    

    "SH.h" and "SH.cpp" was generated by "dumpcpp.exe"

    Console output:

    QAxBase::setControl: requested control {AF5496E4-4D18-4932-A422-4C778BF11053} co
    uld not be instantiated
    false
    QAxBase::qt_metacall: Object is not initialized, or initialization failed
    6317352
    QAxBase::qt_metacall: Object is not initialized, or initialization failed
    6317352
    QAxBase::qt_metacall: Object is not initialized, or initialization failed
    6317352
    QAxBase::qt_metacall: Object is not initialized, or initialization failed
    ""
    Для продолжения нажмите любую клавишу . . .
    QAxBase::qt_metacall: Object is not initialized, or initialization failed
    

    Test utility from developers of SH4 works well, but it used Borland Delphi laguage.

    ==================================================================



  • Hi, QCoreApplication does not start OLE for you, either use QApplication or try adding something like this first:

    CoInitializeEx(NULL, COINIT_MULTITHREADED);
    


  • All works well now.

    Thank you!


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