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Steps:

1. Create a new class CExtTabModel that uses CFOTabPageModel as base class.

2. Create a new class CExtTabModelManager that uses CExtTabModelManager as base class.

3. Create a new class CVisioAppView that uses CFOTabPageView as base class.

4.  Create Visio like tab pages:

BOOL CChildFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext) 
{
	// TODO: Add your specialized code here and/or call the base class
	pContext->m_pNewViewClass = RUNTIME_CLASS(CVisioAppView);

	// creates the tab window
	CVisioAppDoc* pDoc = (CVisioAppDoc*) pContext->m_pCurrentDoc;
	CExtTabModel *pModel = (CExtTabModel *)pDoc->m_pModelManager->InsertTab();
	VERIFY(m_wndTab.Create(this,pDoc->m_pModelManager,pContext));
	// next sheets
	m_wndTab.InsertPage(pModel,pContext);

	return TRUE;
}

5. Add new page or remove page:

void CChildFrame::OnFoAddNewpage() 
{
	// TODO: Add your command handler code here
	CVisioAppDoc* pDoc = (CVisioAppDoc*)GetActiveDocument();
	CExtTabModel *pModel = (CExtTabModel *)pDoc->m_pModelManager->InsertTab();
	m_wndTab.InsertPage(pModel,NULL);
}

void CChildFrame::OnFoRemovePage() 
{
	// TODO: Add your command handler code here
	CVisioAppDoc* pDoc = (CVisioAppDoc*) GetActiveDocument();
	int nCurrentTab = m_wndTab.GetTabControl()->m_nSelect;
	if(m_wndTab.RemoveTab(nCurrentTab))
	{
		pDoc->m_pModelManager->DeleteTab(nCurrentTab);
	}
}