How to use Windows API with QT4?

[MakSim345]

Hi.
I have an _existing_ MS VC++ application, to where I have to "attach" a GUI, made by QT4.3.3
I can compile some simple GUIs with VS2005;
I can compile the existing app (let's say it is "time.exe", and it shows milliseconds on command prompt).
But I can not combine them together, in one project.
Here's an example of class in the time.exe which I can't compile from QT4 project:

class CTimer
{
public:
   CTimer();
  ~CTimer();
   void Start();
   unsigned int GetElapsedTimeMs() const;
   unsigned __int64 GetElapsedTimeMks() const; 
 
private:
  LARGE_INTEGER m_liFreq;
  LARGE_INTEGER m_liStart;
  LARGE_INTEGER m_liEnd;
};

class CTimer
{
public:
   CTimer();
  ~CTimer();
   void Start();
   unsigned int GetElapsedTimeMs() const;
   unsigned __int64 GetElapsedTimeMks() const; 
    
private:
  LARGE_INTEGER m_liFreq;
  LARGE_INTEGER m_liStart;
  LARGE_INTEGER m_liEnd;
};

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implementation:

// Timer class
CTimer::CTimer() 
{ 
 ::QueryPerformanceFrequency(&m_liFreq);
 Start();
}
 
void CTimer::Start()
{ 
 ::QueryPerformanceCounter(&m_liStart);  
}
 
unsigned int CTimer::GetElapsedTimeMs() const
{
  LARGE_INTEGER liEnd;
  ::QueryPerformanceCounter(&liEnd);  
  return static_cast<unsigned int>((liEnd.QuadPart - m_liStart.QuadPart) * 1000 / m_liFreq.QuadPart);
}
 
unsigned __int64 CTimer::GetElapsedTimeMks() const 
{
  LARGE_INTEGER liEnd;
  ::QueryPerformanceCounter(&liEnd);
  return static_cast<unsigned __int64>((liEnd.QuadPart - m_liStart.QuadPart) * 1000000 / m_liFreq.QuadPart);
}
 
// End of the class.

// Timer class
CTimer::CTimer() 
{ 
 ::QueryPerformanceFrequency(&m_liFreq);
 Start();
}

void CTimer::Start()
{ 
 ::QueryPerformanceCounter(&m_liStart);  
}

unsigned int CTimer::GetElapsedTimeMs() const
{
  LARGE_INTEGER liEnd;
  ::QueryPerformanceCounter(&liEnd);  
  return static_cast<unsigned int>((liEnd.QuadPart - m_liStart.QuadPart) * 1000 / m_liFreq.QuadPart);
}

unsigned __int64 CTimer::GetElapsedTimeMks() const 
{
  LARGE_INTEGER liEnd;
  ::QueryPerformanceCounter(&liEnd);
  return static_cast<unsigned __int64>((liEnd.QuadPart - m_liStart.QuadPart) * 1000000 / m_liFreq.QuadPart);
}

// End of the class.

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The QT project itself is very trivial - one button and one editbox, no point to show it here, I guess.

Example of errors i have if for example "winbase.h" file included:

1>moc_mywidget.cpp
1>c:\program files\microsoft visual studio 8\vc\platformsdk\include\winbase.h(226) : error C2146: syntax error : missing ';' before identifier 'Internal'
1>c:\program files\microsoft visual studio 8\vc\platformsdk\include\winbase.h(226) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

1>moc_mywidget.cpp
1>c:\program files\microsoft visual studio 8\vc\platformsdk\include\winbase.h(226) : error C2146: syntax error : missing ';' before identifier 'Internal'
1>c:\program files\microsoft visual studio 8\vc\platformsdk\include\winbase.h(226) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

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If someone could help me, explaining what settings I have to change on VS2005, any path to include, anything what may help, I'd appreciated it so much.
Thank you.

[ChristianEhrlicher]

It should work out of the box - maybe you forgot to include <windows.h> or something like this?