Go implements automatic copying of USB drive widget demo

package main
import (
  "io"
  "strings"
  "os"
  "path/filepath"
  "fmt"
  "strconv"
  "syscall"
  "/x/sys/windows/registry"
)
// Get the inserted U disk letterfunc GetUDisk() []string {
    //Check the registry to determine whether to insert the USB flash drive    k, err := (registry.LOCAL_MACHINE, `SYSTEM\CurrentControlSet\Services\USBSTOR\Enum`, registry.QUERY_VALUE)
    if err != nil {
        ("Not have U-Disk")
        return nil
    }
    defer ()
    // Get the value in the registry and get several USB drives inserted    count, _, err := ("Count")
    // Get all drive letters    disks := GetSystemDisks()
    return disks[len(disks)-int(count):]
}
//Recursively copy the directoryfunc copyDir(src string, dest string)  {
  src_original := src
  err := (src, func(src string, f , err error) error {
    if f == nil {
      return err
    }
    if () {
      //      (())
      //copyDir((), dest+"/"+())
    } else {
      //(src)
      //(src_original)
      //(dest)
      dest_new := (src, src_original, dest, -1)
      //(dest_new)
      //("CopyFile:" + src + " to " + dest_new)
      CopyFile(src, dest_new)
    }
    //println(path)
    return nil
  })
  if err != nil {
    //("() returned %v\n", err)
  }
}
// Copy the filefunc CopyFile(src, dst string) (w int64, err error) {
  srcFile, err := (src)
  if err != nil {
    (())
    return
  }
  defer ()
  //("dst:" + dst)
  dst_slices := (dst, "\\")
  dst_slices_len := len(dst_slices)
  dest_dir := ""
  for i := 0; i < dst_slices_len-1; i++ {
    dest_dir = dest_dir + dst_slices[i] + "\\"
  }
  //dest_dir := getParentDirectory(dst)
  //("dest_dir:" + dest_dir)
  b, err := PathExists(dest_dir)
  if b == false {
    err := (dest_dir, ) //Generate md directory in the current directory    if err != nil {
      (err)
    }
  }
  dstFile, err := (dst)
  if err != nil {
    (())
    return
  }
  defer ()
  return (dstFile, srcFile)
}
func getFilelist(path string) {
  err := (path, func(path string, f , err error) error {
    if f == nil {
      return err
    }
    if () {
      return nil
    }
    //println(path)
    return nil
  })
  if err != nil {
    //("() returned %v\n", err)
  }
}
func PathExists(path string) (bool, error) {
  _, err := (path)
  if err == nil {
    return true, nil
  }
  if (err) {
    return false, nil
  }
  return false, err
}
func main() {
  if len(GetUDisk()) <= 0 {
    ("No USB drive inserted")
    return
  }
  for _, v := range  GetUDisk() {
    (v + "\\")
    copyDir(v + "\\",v + ":\\go_copy")
  }
}