Question

我正在编写一个锁定到另一个应用程序的应用程序，我没有源代码，但有一些东西使它显示.NET Framework异常消息。

我可以用我的代码检测它何时打开，我想得到它的句柄并关闭它。有时这个子窗口从主窗口获取标题，所以我不能依赖它来找到它的句柄。

有问题的子窗口的图像：

Answer 1

好的，我解决了。事实证明，GetForegroundWindow（）返回了正确的句柄，但是，因为有时异常窗口从我被绊倒的父级获取标题。

解决方法是等待使用EnumWindows更改窗口数，然后获取前景窗口的句柄并关闭它。

new Thread(() =>
{
    int pid = Program.GetHelperProcess().Id;
    int lastCount = -1;
    while (true)
    {
        int newCount = WinUtil.GetWindowCount(pid);
        if (lastCount != -1 && lastCount != newCount)
        {
            break;
        }
        lastCount = newCount;
        Thread.Sleep(30);
    }
    WinUtil.CloseWindow(WinUtil.GetForegroundWindow());
}).Start();

<强> WinUtil.cs

class WinUtil
{
    [DllImport("user32.dll")]
    public static extern IntPtr GetForegroundWindow();

    private delegate bool EnumWindowsProc(IntPtr hWnd, int lParam);

    [DllImport("user32.dll", SetLastError = true)]
    private static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);

    [DllImport("user32.dll")]
    private static extern bool EnumWindows(EnumWindowsProc enumFunc, int lParam);

    [DllImport("user32.dll")]
    private static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

    [DllImport("user32.dll")]
    private static extern int GetWindowTextLength(IntPtr hWnd);

    [DllImport("user32.dll")]
    private static extern bool IsWindowVisible(IntPtr hWnd);

    [DllImport("user32.dll")]
    private static extern IntPtr GetShellWindow();

    public static int GetWindowCount(int processId)
    {
        IntPtr hShellWindow = GetShellWindow();
        int count = 0;
        EnumWindows(delegate (IntPtr hWnd, int lParam)
        {
            if (hWnd == hShellWindow) return true;
            if (!IsWindowVisible(hWnd)) return true;

            int length = GetWindowTextLength(hWnd);
            if (length == 0) return true;

            uint windowPid;
            GetWindowThreadProcessId(hWnd, out windowPid);
            if (windowPid != processId) return true;

            count++;
            return true;
        }, 0);
        return count;
    }

    public static string GetWindowTitle(IntPtr hWnd)
    {
        int textLength = GetWindowTextLength(hWnd);
        StringBuilder outText = new StringBuilder(textLength + 1);
        int a = GetWindowText(hWnd, outText, outText.Capacity);
        return outText.ToString();
    }

    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    private static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);

    private const UInt32 WM_CLOSE = 0x0010;

    public static void CloseWindow(IntPtr hwnd)
    {
        SendMessage(hwnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
    }
}

C＃从另一个进程关闭子窗口

1 个答案: