$ go env
set GOARCH=386
set GOBIN=
set GOCACHE=C:\Users\IEUser\AppData\Local\go-build
set GOEXE=.exe
set GOFLAGS=
set GOHOSTARCH=386
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=C:\Users\IEUser\go
set GOPROXY=
set GORACE=
set GOROOT=C:\Go
set GOTMPDIR=
set GOTOOLDIR=C:\Go\pkg\tool\windows_386
set GCCGO=gccgo
set GO386=sse2
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m32 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessag
e-length=0 -fdebug-prefix-map=C:\Users\IEUser\AppData\Local\Temp\go-build4397225
02=/tmp/go-build -gno-record-gcc-switches

package main

import "log"
import "syscall"
import "io/ioutil"
import "os"

// Create a file at c:\test\files\<w>.txt
func write(w uint16, content []byte) {
	pathb := []byte("c:\\test\\files\\")
	path := []uint16{}
	for _, c := range pathb {
		path = append(path, uint16(c))
	}
	fileName := []uint16{w, '.', 't', 'x', 't'}
	log.Printf("  Converted filename: %#x", fileName)
	path = append(path, fileName...)
	pathp := &path[0]
	access := uint32(syscall.GENERIC_READ | syscall.GENERIC_WRITE)
	sharemode := uint32(syscall.FILE_SHARE_READ | syscall.FILE_SHARE_WRITE)
	createmode := uint32(syscall.CREATE_ALWAYS)
	h, e := syscall.CreateFile(pathp, access, sharemode, nil, createmode, syscall.FILE_ATTRIBUTE_NORMAL, 0)
	if e != nil {
		log.Printf("  CreateFile failed: %s", e)
	} else {
		n, e := syscall.Write(h, content)
		if n != len(content) || e != nil {
			log.Printf("  Write failed: n=%d e=%s", n, e)
		}
	}
	syscall.Close(h)
}

func main() {
	testCases := []uint16{'a', 0xdc00}

	for _, w := range testCases {
		b := []byte{byte(w)}
		if w > 0xff {
			b = []byte{byte(w >> 8), byte(w)}
		}
		fileName := string(b) + ".txt"
		log.Printf("Writing %#x to %#x", b, fileName)
		write(w, b)
	}

	log.Printf("Reading from directory...")
	files, err := ioutil.ReadDir("c:\\test\\files\\")
	if err != nil {
		log.Fatal(err)
	}

	for _, file := range files {
		filePath := "c:\\test\\files\\" + file.Name()
		log.Printf("  Filename string: %#x", []byte(file.Name()))
		f, err := os.Open(filePath)
		if err != nil {
			log.Printf("    Error opening: %s", err)
		} else {
			buf, err := ioutil.ReadAll(f)
			if err != nil {
				log.Printf("    error reading: %s", err)
			} else {
				log.Printf("    successfully opened; content=%#x", buf)
			}
			f.Close()
		}
	}
}