pub type LPWSPRECV = Option<unsafe extern "system" fn(s: SOCKET, lpbuffers: *const WSABUF, dwbuffercount: u32, lpnumberofbytesrecvd: *mut u32, lpflags: *mut u32, lpoverlapped: *mut OVERLAPPED, lpcompletionroutine: LPWSAOVERLAPPED_COMPLETION_ROUTINE, lpthreadid: *const WSATHREADID, lperrno: *const i32) -> i32>;
enum LPWSPRECV {
None,
Some(unsafe extern "system" fn(_: SOCKET, _: *const WSABUF, _: u32, _: *mut u32, _: *mut u32, _: *mut OVERLAPPED, _: Option<unsafe extern "system" fn(_: u32, _: u32, _: *mut OVERLAPPED, _: u32)>, _: *const WSATHREADID, _: *const i32) -> i32),
}