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I create some CTreeCtrl in CExtPageNavigatorWnd object, and all CTreeCtrl seem to be not scrollable.
How could I do ?

That line looks strange. Why do you create a new tree (m_TreeCtrl_AllFolder) as a child of another tree (m_wndPNAllFolders)?

m_TreeCtrl_AllFolder.Create(WS_VISIBLE|WS_CHILD|TVS_HASLINES|TVS_HASBUTTONS|TVS_LINESATROOT,
    recta, &m_wndPNAllFolders, IDC_TREEDIR);

Sorry, I lose a line in my post code:

///////////////////////////// MainFrm.h //////////////////////////////////
...
    CDirTreeCtrl m_TreeCtrl_AllFolder;
...

CDirTreeCtrl look like : http://picasaweb.google.com.tw/ooy.yoo/Others/photo#5039047524469930946
CDirTreeCtrl inheri from CTreeCtrl class

My unscrollable problem seem to have no concern with CDirTreeCtrl, but to m_wndResizableBarTree(CExtControlBar class) which I use for replacing the m_wndSplitter(CExtSplitterWnd class)

PS:

Original Structure in PageNavigator:
CPNSplitterWnd --[contain]--> CExtPageNavigatorWnd --[constain]--> CTreeCtrl
My Structure:
CExtControlBar --[contain]--> CExtPageNavigatorWnd --[constain]--> CTreeCtrl --[contain]--> CDirTreeCtrl

The different (may cause of my unscrollable problem) is I use CExtControlBar instead of CPNSplitterWnd

Your Structure should look like

CExtControlBar -- [contain] --> CExtPageNavigatorWnd --[contain]--> CDirTreeCtrl

So the CDirTreeCtrl control should be created as a child of the CExtPageNavigatorWnd, not CTreeCtrl. You can send the CDirTreeCtrl class to us so we can help you insert it into the page navigator.

Ok, I fix that problem now, thanks.

But the other problem:
However I change the theme from UI Theme Switcher Toolbar, the Scrollbar look always is default gray

How could I change the theme of Scrollbar ??

The scrollbars you see are the scrollbars of the CDirTreeCtrl class, which I think is derived from CTreeCtrl, a pure MFC class, that’s why those scrollbars are not themed, because they have nothing to do with ProfUIS. But you can override CWnd::GetScrollBarCtrl method and have ProfUIS scrollbars created, thus they will be themed properly. Here’s how I think it should look like:

class CDirTreeCtrl : public CTreeCtrl
{
...
protected:
	CExtScrollBar m_wndScrollBarH, m_wndScrollBarV;
public:
	virtual CScrollBar * GetScrollBarCtrl( int nBar ) const
	{
		ASSERT_VALID( this );
		if( m_hWnd == NULL || (! ::IsWindow(m_hWnd) ) )
			return NULL;
		ASSERT( nBar == SB_HORZ || nBar == SB_VERT );
		if( nBar == SB_HORZ )
		{
			if( m_wndScrollBarH.GetSafeHwnd() != NULL )
				return ( const_cast < CExtScrollBar * > ( &m_wndScrollBarH ) );
		} // if( nBar == SB_HORZ )
		else
		{
			if( m_wndScrollBarV.GetSafeHwnd() != NULL )
				return ( const_cast < CExtScrollBar * > ( &m_wndScrollBarV ) );
		} // else from if( nBar == SB_HORZ )
		return NULL;
	}
	virtual LRESULT WindowProc( UINT message, WPARAM wParam, LPARAM lParam )
	{
		LRESULT lResult = CTreeCtrl::WindowProc( message, wParam, lParam );
		if ( message == WM_CREATE )
		{
			m_wndScrollBarH.m_eSO = CExtScrollBar::__ESO_BOTTOM;
			m_wndScrollBarV.m_eSO = CExtScrollBar::__ESO_RIGHT;
			if( ! m_wndScrollBarV.Create(
					WS_CHILD|WS_VISIBLE|SBS_VERT|SBS_RIGHTALIGN,
					CRect(0,0,0,0),
					this,
					1
					)
				)
			{
				ASSERT( FALSE );
				break;
			}
			if( ! m_wndScrollBarH.Create(
					WS_CHILD|WS_VISIBLE|SBS_HORZ|SBS_BOTTOMALIGN,
					CRect(0,0,0,0),
					this,
					2
					)
				)
			{
				ASSERT( FALSE );
				break;
			}
			m_wndScrollBarH.SyncReservedSpace( &m_wndScrollBarV );
			m_wndScrollBarV.SyncReservedSpace( &m_wndScrollBarH );
			//OnSwRecalcLayout( true ); // I’m not sure what to call instead of this and whether it’s needed at all.
		}
		return lResult;
	}
...
};

Or if you already have a CDirTreeCtrl::OnCreate method implemented, the code snippet from WindowProc should be placed there.

Everything work find except "OnSwRecalcLayout(true)"
How could I make sure how to use something like "OnSwRecalcLayout(true)"

You can learn more about this if you look at this sample.

In other words, I need the TreeCtrl in the PageNavigator sample (allfolder, favorite, shortcut) to be scrollable

Now my app structure:

CExtControlBar --[contain]--> CExtPageNavigatorWnd --[constain]--> CTreeCtrl --[contain]--> CDirTreeCtrl

The Folder browsing in the CDirTreeCtrl won’t be scrollable

Code:

///////////////////////////// MainFrm.h //////////////////////////////////
...
    CExtControlBar m_wndResizableBarTree;
    CExtPageNavigatorWnd m_wndPageNavigator;
    CTreeCtrl m_wndPNShortcuts;
    CTreeCtrl m_wndPNAllFolders;
    CTreeCtrl m_wndPNFavoriteFolders;
...


///////////////////////////// MainFrm.cpp //////////////////////////////////
...
    _splash.SetStatusText(_T("Creating TreeBar ..."));
    m_wndResizableBarTree.SetInitDesiredSizeVertical(
        CSize( 200, 400 )
        );
    m_wndResizableBarTree.SetInitDesiredSizeHorizontal(
        CSize( 400, 200 )
        );
    if(    !m_wndResizableBarTree.Create(
            _T("Folder Bar"), // _T("Optional control bar caption"),
            this,
            ID_VIEW_RESIZABLEBAR_TREE
            )
        )
    {
        TRACE0("Failed to create m_wndResizableBarTree\n");
        return -1;        // fail to create
    }
    m_wndPageNavigator.Create(
        &m_wndResizableBarTree,
        CRect(0, 0, 0, 0),
        m_wndResizableBarTree.GetDlgCtrlID()
        );

    CExtPageNavigatorWnd::PAGE_ITEM_INFO * pPII = m_wndPageNavigator.ItemInsert(
        -1,
        _T("Folder List"),
        (HICON)::LoadImage( ::AfxGetInstanceHandle(), MAKEINTRESOURCE(IDI_FOLDER_LIST), IMAGE_ICON, 24, 24, 0 ),
        (HICON)::LoadImage( ::AfxGetInstanceHandle(), MAKEINTRESOURCE(IDI_FOLDER_LIST_SMALL), IMAGE_ICON, 16, 16, 0 )
        );

    m_wndPNAllFolders.Create(
        WS_CHILD|WS_VISIBLE|TVS_HASBUTTONS|TVS_LINESATROOT,
        CRect(0,0,0,0),
        &m_wndPageNavigator,
        UINT( IDC_STATIC )
        );

    HTREEITEM hItem = NULL;
    HTREEITEM hItemRoot = NULL;

    m_wndPNAllFolders.Expand( hItem, TVE_EXPAND );
    m_wndPNAllFolders.Expand( hItemRoot, TVE_EXPAND );

    //get drawing area size
    CRect recta;
    GetClientRect(recta);

    //Create TreeCtrl
    m_TreeCtrl_AllFolder.Create(WS_VISIBLE|WS_CHILD|TVS_HASLINES|TVS_HASBUTTONS|TVS_LINESATROOT,
    recta, &m_wndPNAllFolders, IDC_TREEDIR);
    m_TreeCtrl_AllFolder.iTreePath=CSIDL_DESKTOP ;
    m_TreeCtrl_AllFolder.Initialize();

    pPII->PaneInsert(
        m_wndPNAllFolders.GetSafeHwnd(),
        -1,
        _T(""),
        50,
        true
        );
...

How could I do ?