Hi All,

This post has also been posted at QtForum.org. So sorry for those who already saw it. I guess that both communities are different enough to give me the right to kind of cross-posting.

I'm trying to develop a COM in-process server and an App that uses it. I'm using Qt 4.3 for Windows, commercial license of course.

Both projects compile well, the only COM interface is correctly registered, but here is what I get at runtime:

Qt Code: 
  1. QAxBase::setControl: requested control {e2195f4c-620b-4c24-a1af-dc2ee3af1b3f} could not be instantiated
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This is my first Qt using COM, so I'm not quite sure I'm doing the right thing. Could you guys have a look at what I've done so far? Here is the full source code: TestCOM.zip

First project: Lib

Lib.pro
Qt Code: 
  1. TEMPLATE = lib
  2. CONFIG += qt warn_on qaxserver dll
  3. contains(CONFIG, static):DEFINES += QT_NODLL
  4. HEADERS = CDummy.h
  5. SOURCES = main.cpp
  6. RC_FILE	 = c:/qt/4.3.0/src/activeqt/control/qaxserver.rc
  7. DEF_FILE = c:/qt/4.3.0/src/activeqt/control/qaxserver.def
  8. TARGET = TestCOM
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CDummy.h
Qt Code: 
  1. #ifndef CDUMMY
  2. #define CDUMMY
  3. #include <QtCore>
  4.  
  5. class CDummy : public QObject
  6. {
  7. 	Q_OBJECT
  8. 	Q_CLASSINFO("ClassID", "{e2195f4c-620b-4c24-a1af-dc2ee3af1b3f}")
  9. 	Q_CLASSINFO("InterfaceID", "{88d27a36-8b02-4079-bea2-ebaa083483d2}")
  10.  
  11. 	// Constructor, destructor
  12. 	public:
  13. 	CDummy(QObject * parent = 0)
  14. 	:	QObject(parent)
  15. 	{
  16. 	}
  17.  
  18. 	// Slots
  19. 	public slots:
  20. 	QString sayHello(void)
  21. 	{
  22. 		return QString("hello world");
  23. 	}
  24. };
  25.  
  26.  
  27. #endif
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main.cpp
Qt Code: 
  1. #include <QAxFactory>
  2. #include "CDummy.h"
  3.  
  4. QAXFACTORY_BEGIN("{96732a53-f7cd-477a-a530-7a6a49f12b2b}", "{d4f59aa6-c2e3-4a2e-a1b2-1eb665ec597c}")
  5. 	QAXCLASS(CDummy)
  6. QAXFACTORY_END()
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Second project: App

App.pro
Qt Code: 
  1. TEMPLATE = app
  2. TARGET	 = TestCOM
  3. CONFIG	+= qaxcontainer
  4. TYPELIBS = $$system(dumpcpp -getfile {96732a53-f7cd-477a-a530-7a6a49f12b2b})
  5.  
  6. isEmpty(TYPELIBS) {
  7.     message("TestCOM type library not found!")
  8. } else {
  9.     SOURCES  = main.cpp
  10. }
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main.cpp
Qt Code: 
  1. #include <QAxObject>
  2. #include <QtCore>
  3. #include "TestCOM.h"
  4.  
  5. int main(int argc, char ** argv)
  6. {
  7. 	QCoreApplication a(argc, argv);
  8.  
  9. 	testcomLib::CDummy dummy;
  10. 	QAxObject object("{e2195f4c-620b-4c24-a1af-dc2ee3af1b3f}");
  11.  
  12. 	qDebug() << "dummy" << dummy.sayHello();
  13. 	qDebug() << "object" << object.dynamicCall("sayHello()").toString();
  14.  
  15. 	return a.exec();
  16. }
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Cheers!

Fabien