class refobj

 #include<windows.h>
class refobj
{
public:
	refobj() : m_refcount(0) {}
	virtual long addref() { return InterlockedIncrement(&m_refcount); }
	virtual long release() { long r = InterlockedDecrement(&m_refcount); if(!r) delete this; return r; }
protected:
	virtual ~refobj() {}
	long m_refcount;
private:
};

class DTMFBuffer:public refobj
{

}

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