68   uuid(0CC17481-207C-48bf-901C-96C0095D7DAE),
    71   helpstring(
"IBuffers Interface"),
    72   pointer_default(unique)
    98   [propget, id(DISPID_VALUE), helpstring(
"Property Item")] HRESULT 
Item([in] VARIANT bufferName, [out, retval] 
IBuffer** ppBuffer);
 IBuffer Item([in] VARIANT bufferName)
This property returns an IBuffer object given by name of the buffer. 
Definition of the IBuffer interface to access settings of a single trace buffer. 
Definition of the IBuffers interface which is a collection of IBuffer objects.