MIDL_INTERFACE("56FDF342-FD6D-11d0-958A-006097C9A090")
ITaskbarList : public IUnknown
{
	   public:
	   virtual HRESULT STDMETHODCALLTYPE HrInit(void) =  0 ;
	   virtual HRESULT STDMETHODCALLTYPE AddTab(HWND hwnd) =  0 ;
	   virtual HRESULT STDMETHODCALLTYPE DeleteTab(HWND hwnd) =  0 ;
	   virtual HRESULT STDMETHODCALLTYPE ActivateTab(HWND hwnd) =  0 ;
	   virtual HRESULT STDMETHODCALLTYPE SetActiveAlt(HWND hwnd) =  0 ;
};


CoInitialize(NULL);
ITaskbarList* iTask = NULL;
CoCreateInstance(CLSID_TaskbarList, NULL, CLSCTX_ALL, IID_ITaskbarList, (LPVOID *) &iTask );
if (iTask)
{
   iTask->DeleteTab(m_hWnd); 
   iTask->Release();
}

ModifyStyleEx(WS_EX_APPWINDOW,  0 );