Question

我试图检测用户何时解锁其工作站。以下代码尝试使用WTSRegisterSessionNotification（）注册窗口以接收会话更改消息。据说在此之后，我可以监听WM_WTSSESSION_CHANGE，它可以包含WTS_SESSION_UNLOCK作为参数。

问题：目前WTSRegisterSessionNotification（）始终返回false。

任何人都知道如何实现这一目标？我正在使用Windows 10 btw。

var {remote} = require('electron');
var ffi = require('ffi');
var winctl = require('winctl');

var NOTIFY_FOR_ALL_SESSIONS = 1;
var WM_WTSSESSION_CHANGE = parseInt('0x02B1', 16);

var hwnd = remote.getCurrentWindow().getNativeWindowHandle();

var wtsapi32 = ffi.Library('wtsapi32', {
  'WTSRegisterSessionNotification': [ 'bool', [ 'int', 'int' ] ]
});

// Attempt to register
var isregistered = wtsapi32.WTSRegisterSessionNotification(hwnd, NOTIFY_FOR_ALL_SESSIONS);

console.log(isregistered); // <----- RETURNS 0...?

无可置疑的推荐GetLastError（）。遗憾的是，node-ffi不支持这一点。 https://github.com/node-ffi/node-ffi/issues/261

Answer 1

You should not be using winctl.GetActiveWindow to get a HWND because you don't actually know which window is active. As far as I can tell GetActiveWindow calls GetForegroundWindow internally and that is insane for two reasons:

GetForegroundWindow returns the foreground window on the users desktop and could be a window in another application.
Windows has an actual function named GetActiveWindow and it is not the same as calling GetForegroundWindow.

Create a hidden native window somehow or use a window provided by electron (GetTopLevelNativeWindow perhaps?)

GetLastError returns the wrong value because you are calling it too late. There is a thick layer of stuff between you and the native Windows function and something is calling SetLastError before you regain control. The 'ffi' library needs a way to specify that you want it to call GetLastError on your behalf immediately after calling the requested function.

And finally, a Windows BOOL is int sized and I'm guessing node.js treats it as a byte?

Answer 2

结束了对此的放弃。我验证了HWND是正确的，但无论出于何种原因它仍然无效。我最终在C＃中编写了一个小函数，并使用node-edge从节点/电子内执行它。

检测用户何时解锁工作站

2 个答案: