Go で Windows のアイドル時間を取得する方法?

<code class="go">import (
    "syscall"
    "unsafe"
)

// GetWindowsIdleTime retrieves the idle time of a Windows system
func GetWindowsIdleTime() (idleTime uint32, err error) {

    // Load the user32 DLL and locate the GetLastInputInfo procedure
    user32, err := syscall.LoadDLL("user32.dll")
    if err != nil {
        return
    }
    getLastInputInfo, err := user32.FindProc("GetLastInputInfo")
    if err != nil {
        return
    }

    // Define the structure to receive the input information
    var lastInputInfo struct {
        cbSize uint32
        dwTime uint32
    }
    // Set the structure size
    lastInputInfo.cbSize = uint32(unsafe.Sizeof(lastInputInfo))

    // Call the GetLastInputInfo function
    r1, _, err := getLastInputInfo.Call(uintptr(unsafe.Pointer(&lastInputInfo)))
    if r1 == 0 {
        err = fmt.Errorf("error getting last input info: %w", err)
        return
    }

    // Return the input idle time
    idleTime = lastInputInfo.dwTime
    return
}</code>