15.1.3. Problem with nested CXTPSplitterWnd

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)
{
     if (     !m_wndSplitterHorz.CreateStatic(this, 2, 1)
        ||    !m_wndSplitterHorz.CreateView(1, 0, RUNTIME_CLASS(CXTPReportView), CSize(100, 100), pContext))
          return FALSE;
 
     if (     !m_wndSplitterVert.CreateStatic(&m_wndSplitterHorz, 1, 2, WS_CHILD | WS_VISIBLE, m_wndSplitterHorz.IdFromRowCol(0, 0))
        ||    !m_wndSplitterVert.CreateView(0, 0, RUNTIME_CLASS(CXTPReportView), CSize(100, 100), pContext)
        ||    !m_wndSplitterVert.CreateView(0, 1, RUNTIME_CLASS(CXTPReportView), CSize(100, 100), pContext))
          return FALSE;
 
     m_wndSplitterHorz.SetRowInfo(0, 630, 0);
     m_wndSplitterVert.SetColumnInfo(0, 630, 0);
 
     CXTPControlTheme::SetTheme(m_hWnd, xtpControlThemeOffice2003);
 
     //return CMainFrameParrent::OnCreateClient(lpcs, pContext);
     return TRUE;
}

m_wndSplitterHorz.EnableFullDrag(0)