idleMonitor.go

package main

import (
	"fmt"
	"syscall"
	"time"
	"unsafe"
)

func main() {

	user32 := syscall.MustLoadDLL("user32.dll")
	kernel32 := syscall.MustLoadDLL("kernel32.dll")
	getLastInputInfo := user32.MustFindProc("GetLastInputInfo")
	getTickCount := kernel32.MustFindProc("GetTickCount")

	var lastInputInfo struct {
		cbSize uint32
		dwTime uint32
	}
	lastInputInfo.cbSize = uint32(unsafe.Sizeof(lastInputInfo))

	for {

		r1, _, err := getLastInputInfo.Call(uintptr(unsafe.Pointer(&lastInputInfo)))
		if r1 == 0 {
			panic("error getting last input info: " + err.Error())
		}

		tick, _, err := getTickCount.Call()

		msSinceLastInput := time.Duration(uint32(tick)-lastInputInfo.dwTime) * time.Millisecond
		fmt.Printf("Time Since Last Input: %v\n", msSinceLastInput)

		time.Sleep(5 * time.Second)

	}

}