package main   

import (

  "syscall"

  "unsafe"

)  

func main(){

    h, err := syscall.LoadLibrary("DllTest.dll")

    if err != nil {

      abort("LoadLibrary", err)

    }

  defer syscall.FreeLibrary(h)

  proc, err := syscall.GetProcAddress(h, "SomeFunction")

  if err != nil {

    abort("GetProcAddress", err)

  }

  var str = "31231"

  r, _, _ := syscall.Syscall(uintptr(proc), 1, uintptr(unsafe.Pointer(&str)), 0, 0)

  print_version(uint32(r))

}  

func abort(funcname string, err error) {

  panic(funcname + " failed: " + err.Error())

}  

func print_version(v uint32) {

    major := byte(v)

    minor := uint8(v >> 8)

    build := uint16(v >> 16)

    print("windows version ", major, ".", minor, " (Build ", build, ")\n")

}