Hi, I'd like to create an iostream that writes data in binary format to a pre-allocated block of memory. I'm already using array_sink to handle the 'write to a pre-allocated block of memory' part: char* my_data = new char[1024]; io::stream_buffer<io::array_sink> buf(my_data,1024); std::ostream os(&buf); int i = 15; float f = 5.1345; os << i; os << f; os << "Hello World!"; os << 'c'; However, all the data written to my_data is in text format (i.e. 15 is encoded in 2 bytes 0x31 0x35 instead of 4 (assuming 32-bit integers)). What I'd like is something like file_sink where you specify the mode as binary. The 'mode' seems to be a Device-level decision (as it is with basic_file_sink) so I'm guessing array_sink is not what I need afterall. Does something exist for writing binary data to a block of memory? -- Edwin Vane RapidMind, Inc.