gistfile1.cpp

class ScreenHDC
{
public:
    ScreenHDC() { m_hdc = ::GetDC(NULL);    }
   ~ScreenHDC() { ::ReleaseDC(NULL, m_hdc); }

    operator HDC() const { return m_hdc; }

private:
    HDC m_hdc;

    DECLARE_NO_COPY_CLASS(ScreenHDC)
};