Go -- 调用dll库

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")
}