windows下5秒关闭屏幕

ScreenCloser.go

// ScreenCloser project main.go
package main

import (
	"syscall"
	"time"
)

const (
	SC_MONITORPOWER = 0xF170
	WM_SYSCOMMAND   = 274
	HWND_BROADCAST  = 0xFFFF
)

func main() {
	time.Sleep(time.Second * 5)
	libuser32 := MustLoadLibrary("user32.dll")
	sendMessage := MustGetProcAddress(libuser32, "SendMessageW")
	syscall.Syscall6(sendMessage, 4, HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, 2, 0, 0)
}

func MustLoadLibrary(name string) uintptr {
	lib, err := syscall.LoadLibrary(name)
	if err != nil {
		panic(err)
	}

	return uintptr(lib)
}

func MustGetProcAddress(lib uintptr, name string) uintptr {
	addr, err := syscall.GetProcAddress(syscall.Handle(lib), name)
	if err != nil {
		panic(err)
	}

	return uintptr(addr)
}