how to use Qt dll in Win32 project

[nish]

do it this way..

// H - Interface
class ISampleClass {
public:
    virtual ~ISampleClass() {}
 
    static    ISampleClass* getInstance();
    virtual void DemoFunction1() = 0; //make everything pure virtual
    virtual void DemoFunction2() = 0;  // [OPTIONAL] Abstract function, so the complete class is abstract
  private:
   static ISampleClass *p;
};
 
// CPP - Implementation
 
ISampleClass* ISampleClass::p=0;
 
 static    ISampleClass* ISampleClass::getInstance();
 {
     if(!p)
      p= new SampleClass; 
    return p;
 }
 
 
 
// H - Implementation
class SampleClass : public QObject, public ISampleClass {
  Q_OBJECT
public:
    SampleClass(QObject *parent = 0);
    virtual ~SampleClass() {}
 
    void DemoFunction1();
    void DemoFunction2();
};
 
// CPP - Implementation
SampleClass::SampleClass(QObject *parent) : QObject(parent) {
}
 
void SampleClass::DemoFunction1() {
  // Do Something
}
 
void SampleClass::DemoFunction2() {
  // Do Something
}
 
//MAIN
int _tmain(int argc, _TCHAR* argv[])
{
    ISampleClass* a=  ISampleClass::getInstance();
    a->DemoFunction1();
    return 0;
}

// H - Interface
class ISampleClass {
public:
    virtual ~ISampleClass() {}
  
    static    ISampleClass* getInstance();
    virtual void DemoFunction1() = 0; //make everything pure virtual
    virtual void DemoFunction2() = 0;  // [OPTIONAL] Abstract function, so the complete class is abstract
  private:
   static ISampleClass *p;
};

// CPP - Implementation

ISampleClass* ISampleClass::p=0;

 static    ISampleClass* ISampleClass::getInstance();
 {
     if(!p)
      p= new SampleClass; 
    return p;
 }



// H - Implementation
class SampleClass : public QObject, public ISampleClass {
  Q_OBJECT
public:
    SampleClass(QObject *parent = 0);
    virtual ~SampleClass() {}

    void DemoFunction1();
    void DemoFunction2();
};

// CPP - Implementation
SampleClass::SampleClass(QObject *parent) : QObject(parent) {
}

void SampleClass::DemoFunction1() {
  // Do Something
}

void SampleClass::DemoFunction2() {
  // Do Something
}

//MAIN
int _tmain(int argc, _TCHAR* argv[])
{
    ISampleClass* a=  ISampleClass::getInstance();
    a->DemoFunction1();
    return 0;
}

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[Fastman]

Sorry, i'am stupid

Now everything works.
I realized QScritEngin in a DLL and is connected to an external win32 project.
Once again, thank you very much.