package main

import "syscall"

func main() {
    h := syscall.MustLoadDLL("kernel32.dll")
    proc := h.MustFindProc("GetVersion")
    r, _, err := proc.Call()
    major := byte(r)
    minor := uint8(r >> 8)
    build := uint16(r >> 16)
    print("windows version ", major, ".", minor, " (Build ", build, ")\n")
    if err != nil {
        e := err.(syscall.Errno)
        println(err.Error(), "errno =", e)
    }
}