Hello, fellow programmers. I`m trying the next thing:

I`m importing SKypeAPI dll Skype4Com and i`m trying to make a call in a new thread, wait 5 secs and finish the call and close the thread. The program is approved as a plugin before placing the call while the program starts. The problem is:

when i click "CALL" and point the mouse pointer outside the GUI.. when the timer kicks finishing the call -> the program freezes and throws some exception... BUT if i make the call and point the mouse to the GUI and click on some tab or even point a tab... when the call finishes, thread exits without freezing the main program. Threads and events are new for me and i`m struggling... do you know what am i missing? Here is some code:

sms.cpp -> from here i call the new thread

Qt Code: 
  1. void SMS::SkypeCallInNewThread()
  2. {
  3. 	// create new thread (on heap) and start it
  4. 	SkypeThread = new MyThread(this);
  5.         SkypeThread->number = "echo123";
  6.         SkypeThread->start(); // after this, thread's run() method starts
  7.         connect(SkypeThread, SIGNAL(finished()), this, SLOT(SkypeThreadFinished()));
  8.  
  9. }
  10.  
  11. void SMS::SkypeThreadFinished()
  12. {
  13.     qDebug() << "Skype thread finished";
  14.     SkypeThread->deleteLater();
  15. }
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myThread.h

Qt Code: 
  1. #ifndef MYTHREAD_H
  2. #define MYTHREAD_H
  3.  
  4. #include <QtGui>
  5. #include <QTimer>
  6. #import "Skype4COM.dll"
  7.  
  8. using namespace SKYPE4COMLib;
  9.  
  10. class MyThread : public QThread
  11. {
  12. 	Q_OBJECT
  13.  
  14. public:
  15. 	MyThread(QObject *parent);
  16.         void run();
  17. 	QString number;
  18.  
  19. private slots:
  20.         void cancelCallfromSkype();
  21.  
  22. private:
  23.         ISkypePtr pSkype;
  24.         ICallPtr pCall;
  25.  
  26. };
  27.  
  28.  
  29. #endif
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mythread.cpp

Qt Code: 
  1. #include "mythread.h"
  2.  
  3. MyThread::MyThread(QObject *parent)
  4. : QThread(parent)
  5. {
  6. }
  7.  
  8. void MyThread::run()
  9. {
  10. 	QByteArray ba = number.toLatin1();
  11. 	_bstr_t s = ba.data();        
  12.         try{
  13.         CoInitialize(NULL);
  14.         pSkype.CreateInstance(__uuidof(SKYPE4COMLib::Skype));
  15.         pSkype->Attach(6,VARIANT_TRUE);
  16.         pCall = pSkype->PlaceCall(s, L"", L"", L"");
  17.     }
  18.         catch(...){
  19.         qDebug() << "exception....";
  20.         }
  21.         QTimer *exitTimer = new QTimer();
  22.         connect(exitTimer, SIGNAL(timeout()), this, SLOT(cancelCallfromSkype()));
  23.         exitTimer->setSingleShot(true);
  24.         exitTimer->start(5000);
  25.         exec();
  26. }
  27.  
  28. void MyThread::cancelCallfromSkype()
  29. {
  30.     try{
  31.         qDebug() << "Stopping the call";
  32.         pCall->Finish();
  33.         qDebug() << "Call stopped...";
  34.     }
  35.     catch(...){
  36.         qDebug() << "Exception....";
  37.         }
  38.     pCall = NULL;
  39.     pSkype = NULL;
  40.     CoUninitialize();
  41.     quit();
  42. }
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When executing pCall->Finish() and the mouse pointer is outside the GUI... main program freezes and throws an exception. When i place the call and point mouse to the GUI and click something... pCall->Finish() executes and thread is exiting. Any idea?