CXTPTabControl is not painting its tab

Hello. I bought the Codejock Professional package two months ago and so I am a obvious novice on this package.

Q1. I am designing a kind of complex user interface which its view is derived from CXTTabView and within one of its tab (CWnd-derived control), I create CXTPTabControl to put more sub tabs. The problem is that I can see the tabs of CXTTabView clearly but the tab of CXTPTabControl created in one of CXTTabView tabs is not visible or clickable at all.

== My codes ==
/// test.h
    CXTPTabControl  m_wndTabControl;
  
/// test.cpp - OnCreate function
m_wndTabControl.Create(WS_CLIPCHILDREN|WS_CLIPSIBLINGS|WS_TABSTOP, CRect(0, 0, 0, 0), this, IDC_MODEL_DATAVIEW_CONTROL);
    m_wndTabControl.GetPaintManager()->SetAppearance(xtpTabAppearanceStateButtons);
    m_wndTabControl.GetPaintManager()->SetPosition(xtpTabPositionBottom);
=====

Q2. While I was trying to solve this problem, I found one interesting thing in the example in the package source, TabManager_vc60. In PropertiesDialog.cpp, if you delete the line from 106 to 108 (see below), then the property dialog should show two tabs, but it does not paint the tabs and child controls correctly. I am wondering whether this is related with my problem or not.

== Removed lines ==
    m_wndTabControl.InsertItem(2, _T("DockingPane"), m_pageDockingPane, 0);
    m_wndTabControl.InsertItem(3, _T("AutoHidePanel"), m_pagePanel, 0);
    m_wndTabControl.InsertItem(4, _T("Margins"), m_pageMargins, 0);
====

The screen capture of Q2 is here. In this case, all children windows of each item are overlapped and displayed here and there at the same time. You can see this problem when you move mouse on over this dialog.

Thank you for the answer. I modified the code as advised -- putting WS_CHILD, but can see no changes. CXTPReportControl is still not painting its tabs. In my case, two controls ( first CXTPReportControl and CXTPPropertyGrid after) are inserted into m_wndToolBar and the report control is shown correctly at where it should be displayed. The only problem is the tab control failing in printing its tabs.

Yes, I process WM_SIZE message as shown below:

void CMyDataController::OnSize(UINT nType, int cx, int cy)
{
    CWnd::OnSize(nType, cx, cy);

    int nTop = 0;

    if (m_wndToolBar.GetSafeHwnd())
    {
        CSize sz = m_wndToolBar.CalcDockingLayout(cx, /*LM_HIDEWRAP|*/ LM_HORZDOCK|LM_HORZ | LM_COMMIT);

        m_wndToolBar.MoveWindow(0, nTop, cx, sz.cy);
        m_wndToolBar.Invalidate(FALSE);
        nTop += sz.cy;
    }
    if (m_wndTabControl.GetSafeHwnd())
    {
        m_wndTabControl.MoveWindow(0, nTop, cx, cy - nTop);
        m_wndTabControl.Invalidate(FALSE);

        CXTPClientRect rc(m_wndTabControl);
        m_wndTabControl.AdjustRect(FALSE, CRect(0, nTop, cx, cy-nTop));
        m_szClientRect = rc.Size();
    }
}

I captured this problem as shown in the below image. You can see the inner ReportControl is displayed well but the tabs of CXTPReportControl in my case supposed to display its tabs at bottom is not drawn at all. But only the space to display the tab is reserved.

Any advice will be very appreciated. This problem has put my development on hold for two days now.

OK. The problem is solved. It was my stupid mistake. The answer is that  the WS_VISIBLE mask is missed when I create m_wndTabControl. I borrowed this code from TabManager_vc60 and in there m_wndTabControl is the child window in the dialog template in which we specify the WS_VISIBLE flag not in the code but in the dialog editor!! However, I am creating the TabControl dynamically in my application and I missed that difference.

Thank you CodeJock! As rmercer said above, they replied very quickly when I use their support forum.