CoInitialize(NULL);
    ITaskbarList *pTaskBar = 0;
    HRESULT hr = CoCreateInstance(CLSID_TaskbarList, 0, CLSCTX_ALL, IID_ITaskbarList, (void**)&pTaskBar);
    if(SUCCEEDED(hr))
    {
        pTaskBar->DeleteTab(m_hWnd);
        pTaskBar->Release();
    }    
    CoUninitialize();