main.go

// +build windows
package main

import (
	"fmt"
	"log"
	"os"
	"syscall"
	"time"

	"github.com/moutend/winhook"
)

var count int

func add(code, wParam, lParam uint32) uintptr {
	fmt.Println("called", count, code, wParam, lParam)
	count++
	return winhook.CallNextHookEx(0, code, wParam, lParam)
}

func main() {
	var err error
	if err = run(os.Args); err != nil {
		log.Fatal(err)
	}
	fmt.Println("done")
	return
}

func run(args []string) (err error) {
	fmt.Println("@@@")
	fn := syscall.NewCallback(add)
	lr := winhook.SetWindowsHookExW(winhook.WH_KEYBOARD_LL, fn, 0, 0)
	if lr != 0 {
		fmt.Println("unknown error %v", lr)
	}
	fmt.Println("sleeping")
	var r bool
	var msg *winhook.MSG
	for n := 0; n < 10; n++ {
		r = winhook.GetMessageW(&msg, 0, 0, 0)
		fmt.Println("received ", r, n)
	}
	time.Sleep(20 * time.Second)
	fmt.Println("done")
	return
}