How to find open windows ?

Quite simple, huh ? I can't seem to find an answer though. I am currently using EnumWindows() but it lists every window (including child windows) and this is not what I want to do. I want to find all windows that are on the taskbar (or alt-tab or whatever). How would I do that ? Google isn't my friend on this topic I think.

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Originally Posted by MSDN

The EnumWindows function does not enumerate child windows, with the exception of a few top-level windows owned by the system that have the WS_CHILD style.

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Originally Posted by MSDN

The GetWindowInfo function retrieves information about the specified window.

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Originally Posted by MSDN

The WINDOWINFO structure contains window information.

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30 seconds...

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I want to find all windows that are on the taskbar (or alt-tab or whatever). How would I do that ?

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Windows in the Alt-Tab list

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Originally Posted by abachler

30 seconds...

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Tried that. It excludes windows which should be on that list and includes stuff that shouldn't be there (including start menu, SysFader, CiceroUIWndFrame (wtf is this ?)...).

Code:

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BOOL CALLBACK FillWindowVec(HWND wnd, LPARAM)
{
    WINDOWINFO wi;
    GetWindowInfo(wnd, &wi);
    if(!(wi.dwStyle & WS_CHILD)) WindowVec.push_back(wnd);
}

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I will try Bob's method.

Using the code listed in Bob's link WindowVec now gets filled with only a single element whose caption is "0 - ".

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Originally Posted by MSDN

The GetWindow function retrieves a handle to a window that has the specified relationship (Z-Order or owner) to the specified window.

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start with HWND 0 (desktop) and step through all windows.

Chen did say it was pseudo-code, but this produces the titles of the windows in the Alt-Tab list for me.

Code:

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#include <windows.h>
#include <iostream>

BOOL IsAltTabWindow(HWND hwnd)
{
    LONG_PTR exStyles = GetWindowLongPtr(hwnd, GWL_EXSTYLE);
    // Start at the root owner
    HWND hwndWalk = hwnd;
    // appwindows treated as no owner, so don't try and find one
    if(!(exStyles & WS_EX_APPWINDOW))
    {
        hwndWalk = GetAncestor(hwnd, GA_ROOTOWNER);
    }

    // See if we are the last active visible popup
    HWND hwndTry = hwndWalk;
    while ((hwndTry = GetLastActivePopup(hwndWalk)) != hwndTry) {
        if (IsWindowVisible(hwndTry)) break;
        hwndWalk = hwndTry;
    }
    // tool windows are treated as not visible so they'll never appear in the list
    // fail them here
    return (hwndWalk == hwnd) && !(exStyles & WS_EX_TOOLWINDOW);
}

BOOL CALLBACK Enum(HWND hwnd, LPARAM lParam)
{
    if(IsAltTabWindow(hwnd) && IsWindowVisible(hwnd))
    {
        WCHAR buf[260];
        GetWindowText(hwnd, buf, ARRAYSIZE(buf));
        std::wcout << L"Alt-tab window with title " << buf << L" found\n";
    }
    return TRUE;
}

int __cdecl main()
{
    EnumWindows(&Enum, 0);
}

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