The Binary_r structure encodes an array of uninterpreted bytes.

 typedef struct Binary_r {
   [range(0,2097152)] DWORD cb;
   [size_is(cb)] BYTE* lpb;
 } Binary_r;

cb: The number of uninterpreted bytes represented in this structure. This value MUST NOT exceed 2,097,152.

lpb: The uninterpreted bytes.