QueryPinInfo method retrieves information about the pin. This method implements the IPin::QueryPinInfo method.
Pointer to a PIN_INFO structure that receives the pin information.
Returns S_OK or E_POINTER.
This method uses the CBasePin::m_pName member variable for the achName member of the PIN_INFO structure.
When the method returns, if the pFilter member of the PIN_INFO structure is non-NULL, it has an outstanding reference count. Be sure to release the interface when you are done.