如何在我的C#应用​​程序中获得与Spy ++类似的功能？

Question

我有兴趣为开源密码管理器Keepass开发一个插件.目前,Keepass目前根据窗口标题检测要为您复制/粘贴的密码.这可以防止Keepass检测到根据当前站点(例如Chrome)未主动更新其窗口标题的应用所需的当前密码.

如何通过类似于Spy ++工作方式的其他进程窗口元素(按钮,标签,文本框)？当您运行Spy ++时,您可以将鼠标悬停在其他程序窗口上,并获取有关各种控件(标签,文本框等)的各种属性的各种信息.理想情况下,我希望我的Keepass插件通过遍历活动窗口的元素来增强当前窗口检测,以便找到匹配的帐户来复制/粘贴密码.

如何使用C#处理其他进程窗口元素并能够检索标签和文本框值？

Answer 1

我在这里回答类似这样的问题:如何检测线程是否有窗口句柄？.就像它说的那样,主要的想法是使用EnumWindows和EnumChildWindows API调用来枚举进程窗口及其子窗口以获取窗口句柄,然后使用WM_GETTEXT调用GetWindowText或SendDlgItemMessage来获取窗口文本.我修改了代码来做一个应该做你需要的例子(对不起,它有点长:).它遍历进程及其窗口并将窗口文本转储到控制台中.

static void Main(string[] args)
{
    foreach (Process procesInfo in Process.GetProcesses())
    {
        Console.WriteLine("process {0} {1:x}", procesInfo.ProcessName, procesInfo.Id);
        foreach (ProcessThread threadInfo in procesInfo.Threads)
        {
            // uncomment to dump thread handles
            //Console.WriteLine("\tthread {0:x}", threadInfo.Id);
            IntPtr[] windows = GetWindowHandlesForThread(threadInfo.Id);
            if (windows != null && windows.Length > 0)
                foreach (IntPtr hWnd in windows)
                    Console.WriteLine("\twindow {0:x} text:{1} caption:{2}",
                        hWnd.ToInt32(), GetText(hWnd), GetEditText(hWnd));
        }
    }
    Console.ReadLine();
}

private static IntPtr[] GetWindowHandlesForThread(int threadHandle)
{
    _results.Clear();
    EnumWindows(WindowEnum, threadHandle);
    return _results.ToArray();
}

// enum windows

private delegate int EnumWindowsProc(IntPtr hwnd, int lParam);

[DllImport("user32.Dll")]
private static extern int EnumWindows(EnumWindowsProc x, int y);
[DllImport("user32")]
private static extern bool EnumChildWindows(IntPtr window, EnumWindowsProc callback, int lParam);
[DllImport("user32.dll")]
public static extern int GetWindowThreadProcessId(IntPtr handle, out int processId);

private static List<IntPtr> _results = new List<IntPtr>();

private static int WindowEnum(IntPtr hWnd, int lParam)
{
    int processID = 0;
    int threadID = GetWindowThreadProcessId(hWnd, out processID);
    if (threadID == lParam)
    {
        _results.Add(hWnd);
        EnumChildWindows(hWnd, WindowEnum, threadID);
    }
    return 1;
}

// get window text

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern int GetWindowTextLength(IntPtr hWnd);

private static string GetText(IntPtr hWnd)
{
    int length = GetWindowTextLength(hWnd);
    StringBuilder sb = new StringBuilder(length + 1);
    GetWindowText(hWnd, sb, sb.Capacity);
    return sb.ToString();
}

// get richedit text 

public const int GWL_ID = -12;
public const int WM_GETTEXT = 0x000D;

[DllImport("User32.dll")]
public static extern int GetWindowLong(IntPtr hWnd, int index);
[DllImport("User32.dll")]
public static extern IntPtr SendDlgItemMessage(IntPtr hWnd, int IDDlgItem, int uMsg, int nMaxCount, StringBuilder lpString);
[DllImport("User32.dll")]
public static extern IntPtr GetParent(IntPtr hWnd);

private static StringBuilder GetEditText(IntPtr hWnd)
{
    Int32 dwID = GetWindowLong(hWnd, GWL_ID);
    IntPtr hWndParent = GetParent(hWnd);
    StringBuilder title = new StringBuilder(128);
    SendDlgItemMessage(hWndParent, dwID, WM_GETTEXT, 128, title);
    return title;
}

希望这有帮助,问候