Syntax
Parameters
async   _In_Type: XAsyncBlock* The
XAsyncBlock for this operation.
bufferSize   _In_Type: size_t The size of the provided
buffer.
buffer   _Out_writes_bytes_to_(bufferSize,bufferUsed)Type: void A caller-allocated byte buffer to write results into. ptrToBuffer   _Outptr_
Type: XblMultiplayerActivityDetails** Strongly typed pointer to
buffer. Do not free; its lifecycle is tied to buffer.
ptrToBufferCount   _Out_Type: size_t* Number of entries in
buffer.
bufferUsed   _Out_opt_Type: size_t* Number of bytes actually written to
buffer.
