/***
 * Just a small demonstration script that makes an alert box containing the user the current process is running as
 */
package main

import (
	"log"
	"os/user"
	"syscall"
	"unsafe"
)

// MessageBox of Win32 API.
func MessageBox(hwnd uintptr, caption, title string, flags uint) int {
	ret, _, _ := syscall.NewLazyDLL("user32.dll").NewProc("MessageBoxW").Call(
		uintptr(hwnd),
		uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(caption))),
		uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(title))),
		uintptr(flags))

	return int(ret)
}

// MessageBoxPlain of Win32 API.
func MessageBoxPlain(title, caption string) int {
	const (
		NULL  = 0
		MB_OK = 0
	)
	return MessageBox(NULL, caption, title, MB_OK)
}

func main() {
	currentUser, err := user.Current()
	if err != nil {
		log.Fatalf("Unable to get current user: %s", err)
	}
	userId := currentUser.Username

	MessageBoxPlain("Running as", userId)
}