how to hide CDialogEX from taskbar? (MFC C++)

I have the main-frame, when someone 开发者_运维百科is pressing a button I open a CDialogEX.

After I open it, it get's an empty task-bar tab, with no title or icon...

i want it to open as a child window of the main-frame and without task-bar tab.

i have tried using styles and stuff, but nothing works.

any ideas?

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I'm guessing you are passing NULL as the parent window. Pass the window handle of your main application's window. When you pass NULL the created window is an unowned top-level window and they get taskbar buttons.

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Some bibliography for you:

• http://www.codeguru.com/cpp/frameworks/advancedui/article.php/c3227
• http://www.codeguru.com/forum/archive/index.php/t-442093.html
• http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/2d2ef9ad-487b-43d2-997b-e0c2540064d6/
• http://www.progtown.com/topic62404-hide-mainframe-from-taskbar.html
• http://www.codeproject.com/Articles/191/Creating-an-application-with-no-taskbar-icon

Now the real work. Declare a

CWnd m_wndHidden;

in your class.

Then implement the following method

BOOL CMyMDIChildFrame::PreCreateWindow(CREATESTRUCT& cs) 
{ 
     if (!__super::PreCreateWindow(cs))
         return FALSE;

     // Create hidden window
     if (!::IsWindow(m_wndHidden.m_hWnd))
     {
        pstrOwnerClass = AfxRegisterWndClass(0);
        if (!m_wndHidden.CreateEx(0, pstrOwnerClass, _T(""), WS_POPUP,
                CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
                NULL, 0))
            return FALSE;
     }

    cs.hwndParent = m_wndHidden.m_hWnd;
    return TRUE;
}

The first and last link I provided are based on this approach.