EnumWindows returns closed Windows Store applications

user_1735672 0
Viewed 1511

With this code:

internal static List<DetectedWindow> EnumerateWindows()
{
    var shellWindow = GetShellWindow();

    var windows = new List<DetectedWindow>();

    EnumWindows(delegate (IntPtr handle, int lParam)
    {
        if (handle == shellWindow)
            return true;

        if (!IsWindowVisible(handle))
            return true;

        if (IsIconic(handle))
            return true;

        var length = GetWindowTextLength(handle);

        if (length == 0)
            return true;

        var builder = new StringBuilder(length);

        GetWindowText(handle, builder, length + 1);
        GetWindowRect(handle, out Rect rect);

        windows.Add(new DetectedWindow(handle, rect.ToRect(), builder.ToString()));

        return true;
    }, IntPtr.Zero);

    return windows;
}

Auxiliar class:

public class DetectedWindow
{
    public IntPtr Handle { get; private set; }

    public Rect Bounds { get; private set; }

    public string Name { get; private set; }

    public DetectedWindow(IntPtr handle, Rect bounds, string name)
    {
        Handle = handle;
        Bounds = bounds;
        Name = name;
    }
}

I'm getting this list of applications (Window text - Rect bounds):

Microsoft Visual Studio  - -8;-8;1936;1056
Microsoft Edge - 0;77;1920;963
EnumWindows - Stack Overflow and 7 more pages ‎- Microsoft Edge - -8;-8;1936;1056
Microsoft Edge - 0;77;1920;963
Microsoft Edge - 0;77;1920;963
Microsoft Edge - 0;0;1920;1080
Microsoft Edge - 0;0;1920;1080
Microsoft Edge - 0;8;1920;1040
Microsoft Edge - 0;85;1920;963
Microsoft Edge - 150;79;1532;42
Microsoft Edge - 0;85;1920;963
Microsoft Edge - 0;77;1920;963
Microsoft Edge - 0;85;1920;963
Microsoft Edge - 0;213;1920;964
Microsoft Edge - 0;0;1920;1080
Microsoft Edge - 484;208;952;174
Microsoft Edge - 0;84;1920;964
Microsoft Edge - 0;84;1920;964
Microsoft Edge - 0;84;1920;964 
Microsoft Edge - 0;0;1920;1080
Mail - 0;32;1356;693
Mail - 278;252;1372;733
OneNote - 0;8;1920;1040
My notes - OneNote - -8;-8;1936;1056
Photos - 0;32;1920;1008
Photos - -8;-8;1936;1056
Skype - 0;40;1920;1008
Skype - -8;-8;1936;1056
Store - 0;40;1920;1008
Store - -8;-8;1936;1056
Movies & TV - 0;0;1920;1080
Movies & TV - -8;-8;1936;1056
Groove Music - 0;32;1466;712
Groove Music - -7;3;1372;733
Settings - 0;40;1920;1008
Settings - -8;-8;1936;1056
Windows Shell Experience Host - 0;0;1920;1080

My current not minimized windows are Visual Studio and two Edge windows (with several tabs each). I can understand the fact that only one Edge item was listing the title of the current page. Because I recently recovered from a crash and only that page was loaded.

My questions are:

  1. Why are my closed Windows Store apps being listed? (and even twice)
  2. Why are my Edge tabs being listed?
  3. How can I filter the Edge tabs and the closed Windows Store apps?

EDIT:

  1. By "Filter": Only retrieve the apps with visible window. With my use case, only 3 windows are visible.

I tried to get the WsStyle and WsEXStyle of each window to compare, but I couldn't find any difference.

The method IsWindowVisible() fails filter out the Windows Store apps that are not visible.

winapi c#
3 Answers

I have made simple window filter method that include Microsoft store apps that are cloaked. They are also identified by the class names ApplicationFrameWindow and Windows.UI.Core.CoreWindow

public static class WindowFilter
{
    public static bool NormalWindow(IWindow window)
    {
        if (IsHiddenWindowStoreApp(window,  window.ClassName)) return false;

        return !window.Styles.IsToolWindow && window.IsVisible;
    }

    private static bool IsHiddenWindowStoreApp(IWindow window, string className) 
        => (className == "ApplicationFrameWindow" || className == "Windows.UI.Core.CoreWindow") && window.IsCloaked;
}

The above example is part of a project of github, were you can see the rest of the code. https://github.com/mortenbrudvik/WindowExplorer

user_8475700
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