Problems with QAxObject and accessing Office Word when App running as QtService

Hello,

I am devoloping an Application which should run as Service on a Windows machine. The App receives Word Documents over Network and opens then over the ActiveQt and print them out.

The whole process works fine when i ran the app in debug mode ( the service with the -e option ), but when I start the service in normal operation, the word document couldn't be open. Because there is no exception or any other error message, I have no Idea where the problem might be.

When the app in serice mode tries to open the document the method querySubObject returns an NULL-Pointer.

Here is the Code of the Function which does the printing process( it runs in an own thread ):

Code:

---

void Printjob::SlotPrintDocs()
{
	qDebug() << "Current Thread: " << currentThreadId();
	emit SignalAddLogEntry( QString( "Drucke: Job=%1, User=%2, Drucker=%3" ).arg( m_jobId ).arg( m_user ).arg( m_printer ) );
 
 
	if( CoInitializeEx( 0, COINIT_MULTITHREADED ) != S_OK )
	{
		emit SignalAddLogEntry( "Konnte COM-Objekt im Printjob Thread nicht initialisieren" );
	}
 
	emit SignalAddLogEntry( "Starte Word" );
	QAxObject* pWord = new QAxObject( "Word.Application" );
	pWord->setProperty( "Visible", true );
	QAxObject* pDocuments = pWord->querySubObject( "Documents" );
	QString lastPrinter = pWord->property( "ActivePrinter" ).toString();
 
	connect( pWord, SIGNAL( exception ( int, const QString&, const QString&, const QString& ) ), this, SLOT( SlotComException( int, const QString&, const QString&, const QString& ) ) );
	connect( pDocuments, SIGNAL( exception ( int, const QString&, const QString&, const QString& ) ), this, SLOT( SlotComException( int, const QString&, const QString&, const QString& ) ) );
 
 
	if( ! pWord || ! pDocuments )
	{
		emit SignalAddLogEntry( "Konnte Word nicht öffnen" );
	}
 
	if( ! pWord->setProperty( "ActivePrinter", m_printer ) )
	{
		emit SignalAddLogEntry( "Konnte Drucker nicht wechseln" );
	}
	qDebug() << pWord->property( "ActivePrinter" ).toString();
 
	for( int i = 0; i < m_docs.size(); i++ )
	{
		if( ! QFileInfo( m_docs.at( i ) ).exists() )
		{
			emit SignalAddLogEntry( "Konnte folgenden Dokument nicht finden: " + m_docs.at( i ) );
			continue;
		}
		if( ! QFileInfo( m_docs.at( i ) ).isReadable() )
		{
			emit SignalAddLogEntry( "Konnte folgenden Dokument nicht lesen: " + m_docs.at( i ) );
			continue;
		}
 
		if( m_abortPrint )
		{
			break;
		}
 
		emit SignalAddLogEntry( "Öffne Dokument: " + m_docs.at( i ) );
 
		QVariantList params;
		params << m_docs.at( i ) << true << false << false << "" << "" << false << false << "" << "" << 0 << false << true << 0 << true << false;
		QAxObject* pDoc = pDocuments->querySubObject( "OpenNoRepairDialog (QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&, QVariant&)", params );
		if( ! pDoc )
		{
			emit SignalAddLogEntry( "Konnte Dokument nicht öffnen: " + m_docs.at( i ) );
			continue;
		}
		connect( pDoc, SIGNAL( exception ( int, const QString&, const QString&, const QString& ) ), this, SLOT( SlotComException( int, const QString&, const QString&, const QString& ) ) );
		emit SignalAddLogEntry( "Drucke Dokument: " + m_docs.at( i ) );
		pDoc->dynamicCall( "PrintOut(boolean)", false );
		emit SignalAddLogEntry( "Schliesse Dokument: " + m_docs.at( i ) );
		pDoc->dynamicCall( "Close(boolean)", false );
		delete pDoc;
 
		m_printedDocs.append( m_docs.at( i ) );
		emit SignalSendPrintedDoc( m_docs.at( i ) );
	}
 
	pWord->setProperty( "ActivePrinter", lastPrinter );
	qDebug() << pWord->property( "ActivePrinter" ).toString();
 
	emit SignalAddLogEntry( "Beende Word" );
	pWord->dynamicCall( "Quit()" );
 
	delete pDocuments;
	delete pWord;
	emit SignalFinishedPrinting();
 
	if( m_abortPrint || m_docs.size() == m_printedDocs.size() )
	{
		m_pParent->deleteLater();
	}
}

---

Maybe someone has some more experience with ActiveQt and an idea how can I solve this serious problem.


Ralf