Hello,

i'm using qt 4.7.1 and MSVC++ 2008.

My problem, i can't connect to any interfaces of the windows media player, by activeX.

Small testprogramm

mediaplayer_simple.pro
Qt Code: 
  1. TEMPLATE      = app
  2. CONFIG       += qaxcontainer
  3. HEADERS       = playerwindow.h
  4. SOURCES       = main.cpp \
  5.                 playerwindow.cpp
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playerwindow.h
Qt Code: 
  1. #ifndef PLAYERWINDOW_H
  2. #define PLAYERWINDOW_H
  3.  
  4. #include <QWidget>
  5. class QAxWidget;
  6.  
  7. class PlayerWindow : public QWidget
  8. {
  9.     public:
  10.         PlayerWindow();
  11.  
  12.     private:
  13.         QAxWidget *wmp;
  14. };
  15.  
  16. #endif
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playerwindow.cpp
Qt Code: 
  1. #include <QtGui>
  2. #include <QAxWidget>
  3. #include <QAxObject>
  4.  
  5. #include "playerwindow.h"
  6. #include <windows.h>
  7. #include <wmp.h>
  8.  
  9. PlayerWindow::PlayerWindow()
  10. {
  11.     wmp = new QAxWidget(this);
  12.     wmp->setControl("{6BF52A52-394A-11D3-B153-00C04F79FAA6}");
  13.     wmp->setProperty("URL", "D:/clock.avi");
  14.     qDebug("Version Info: %s", qPrintable(wmp->property("versionInfo").toString()));
  15.  
  16.     IWMPMedia *media;
  17.     wmp->queryInterface(QUuid(IID_IWMPMedia), (void **)&media);
  18.     if (media)
  19.     {
  20.         double dur;
  21.         media->get_duration(&dur);
  22.         qDebug("Duration 2 %f", dur);
  23.         media->Release();
  24.     }
  25.     else
  26.     {
  27.         qDebug("Failed");
  28.     }
  29. }
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main.cpp
Qt Code: 
  1. #include <QApplication>
  2. #include "playerwindow.h"
  3.  
  4. int main(int argc, char *argv[])
  5. {
  6.     QApplication app(argc, argv);
  7.     PlayerWindow playerWin;
  8.     playerWin.show();
  9.     return app.exec();
  10. }
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Compiling failed, playerwindow.obj:: error: ... extern symbol "_IID_IWMPMedia" in Funktion ""public: __thiscall PlayerWindow::PlayerWindow(void)" (??0PlayerWindow@@QAE@XZ)".

Original german compiler Message -->
Verweis auf nicht aufgelöstes externes Symbol "_IID_IWMPMedia" in Funktion ""public: __thiscall PlayerWindow::PlayerWindow(void)" (??0PlayerWindow@@QAE@XZ)".


Something is wanting by the compiler, but i don't know what.
Anybody an idea?