ic.

Problem that you copied code from our sample that don't  check that

GetSelectedItem() can be NULL because it have no ability to close views.

You must add these checks.

F.e.

1. in void CChildFrame::OnUpdateFrameTitle(BOOL bAddToTitle)

add if (pView && pView->m_wndTabControl.GetSelectedItem())

2. in CTabbedViewView::OnSelectedChanged

add

 if (m_wndTabControl.GetSelectedItem())
 {
  CView* pView = DYNAMIC_DOWNCAST(CView, CWnd::FromHandle(m_wndTabControl.GetSelectedItem()->GetHa ndle()));
  ASSERT_KINDOF(CView, pView);

  pFrame->SetActiveView(pView);
 }
 else
 {
  pFrame->SetActiveView(this);
 }

my sources are including a lot of chinese characters, I don't know if you can read them normally, and I found this problem exists when I add a line as follows :

 m_wndTabControl.FindNavigateButton(xtpTabNavigateButtonClose )->SetFlags(xtpTabNavigateButtonAlways);

in the end of the CTabbedViewView::OnCreate(LPCREATESTRUCT lpCreateStruct) function in TabbedView Examples.

shall I write a line as

 m_wndTabControl.FindNavigateButton(xtpTabNavigateButtonClose )->SetFlags(xtpTabNavigateButtonNone);

before I close all the tabItems?

,thank you very much,oleg, it did work,but when application exited, I got a dialog showing:

Unhandled exception at 0x00856626 (XTP9601Libd.dll) in TabCtrlTest.exe: 0xC0000005: Access violation reading location 0x00000038.

ps. not sure but may be "xtpTabNavigateButtonClose" in 9.6  called as

XTP_TABMANAGER_BUTTON_CLOSE

try

m_wndTabControl.FindNavigateButton(xtpTabNavigateButtonClose )->SetFlags(xtpTabNavigateButtonAlways);

I want to devlop an application like the sample of Samples\Common\TabbedView, the views I want to add to the CXTPTabControl are derived from CHtmlView and CFormView, and I want to add or delete tab view dynamically, so I want to display a 'Close' Button or something else for user to close the active tab view, how can I do ? my XT is 9.6

thank you very much if you can answer my question