numHardLock - persist number lock

main.go

package main


/*
	for some reason my number lock kept getting turned off and i couldn't figure out why
	so i made this to check every 250ms to see if my number lock is off, and if it is, turn it back on
 */

import (
	"github.com/gonutz/w32"
	"log"
	"os"
	"time"
)

func init() {
	log.SetOutput(os.Stdout)
	log.Println("numHardLock starting")
}

func numLockWatcher() {

	// get key state
	keyState := w32.GetKeyState(w32.VK_NUMLOCK)

	// conditions here
	if keyState == 0 {
		log.Println("numLock was OFF, turning it back ON")
		_ = w32.SendInput(w32.KeyboardInput(w32.KEYBDINPUT{
			Vk:        w32.VK_NUMLOCK,
			Scan:      0,
			Flags:     0,
			Time:      0,
			ExtraInfo: 0,
		}))
	}

}

func main() {
	done := make(chan bool)

	// main watch thread
	go func() {
		for {
			numLockWatcher()
			time.Sleep(250 * time.Millisecond)
		}
	}()

	<-done
	log.Println("numHardLock exiting")
}

obviously, based on the above code this is only for Windows.

for startup on logon, I use PowerShell via Task Scheduler to hide the command prompt window. i had to use "Run only when user is logged on", and selected my user.

powershell Start-Process -WindowStyle hidden -FilePath c:\numHardLock.exe

note: the Task Scheduler action will need Run with highest privileges checked if you need this to work while a program running as admin has focus. without it, it will only re-enable numlock once window focus changes to something without admin.