#FSharp (usual F# code) yes, it's easy to parse

    let internal (<%=) W Z clear async N =
        let X thriller    =
            (W : Dev).ListPos   .Clear()
            if clear then W.Out .Clear()
            thriller()
            if async then
                    W.Thread <- new Thread( new ThreadStart( fun () -> W.Run(N) ) )
                    W.Thread.Start()
            else    W.Run N
        X <| fun () -> Array.iter(fun z -> W.ListPos.Add <| z) Z