You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: flock_windows.go
    path of file: ./repos/client/go/libkb
    
    the code of the file until where you have to start completion: // Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.

//go:build windows
// +build windows

package libkb

import (
	"fmt"
	"os"
	"syscall"
)

// Open the file with exclusive access (locked to other processes)
// When the process exits, the lock will be released.
func (f *LockPIDFile) Lock() (err error) {
	pathp, err := syscall.UTF16PtrFromString(f.name)
	if err != nil {
		return PIDFileLockError{f.name}
	}
	access := uint32(syscall.GENERIC_READ | syscall.GENERIC_WRITE)
	createmode := uint32(syscall.OPEN_ALWAYS)
	s
    
func (f *LockPIDFile) Lock() (err error) {
	pathp, err := syscall.UTF16PtrFromString(f.name)
	if err != nil {
		return PIDFileLockError{f.name}
	}
	access := uint32(syscall.GENERIC_READ | syscall.GENERIC_WRITE)
	createmode := uint32(syscall.OPEN_ALWAYS)
	sharemode := uint32(syscall.FILE_SHARE_READ) // os.Open always uses FILE_SHARE_READ | FILE_SHARE_WRITE
	var sa *syscall.SecurityAttributes
	r, err := syscall.CreateFile(pathp, access, sharemode, sa, createmode, syscall.FILE_ATTRIBUTE_NORMAL, 0)
	if err != nil {
		return PIDFileLockError{f.name}
	}
	// this is what os.openFile does
	f.file = os.NewFile(uintptr(r), f.name)

	pid := os.Getpid()
	fmt.Fprintf(f.file, "%d", pid)
	f.file.Sync()

	f.G().Log.Debug("Locked pidfile %s for pid=%d", f.name, pid)

	return nil
}