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CExtControlBar object was created dynamically. Button X was subclassed to changed behaviour from "Hide" to "Close". I would like to ask how to destroy CExtControlBar properly?

Thank you in advance
Darius

You can use the following function to destroy the control bar:

#include "../Src/ExtDockBar.h"
#include "../Src/ExtControlBarTabbedFeatures.h"
 

void KillBar(
    CExtControlBar * pBar,
    bool bForceNoOptimizeMode = false // ignore this parameter
    )
{
    ASSERT_VALID( pBar );
    ASSERT_VALID( pBar->m_pDockBar );
    ASSERT_VALID( pBar->m_pDockSite );
CFrameWnd * pDockSite = pBar->m_pDockSite;
    ASSERT( pDockSite->GetSafeHwnd() != NULL );
CMiniDockFrameWnd * pMiniFrame = NULL;
    if( pBar->IsFloating() )
    {
        pMiniFrame = 
            DYNAMIC_DOWNCAST(
                CMiniDockFrameWnd,
                pBar->GetDockingFrame()
                );
        ASSERT_VALID( pMiniFrame );
    } // if( pBar->IsFloating() )
    else
    {
        ASSERT( ! pBar->m_pDockBar->m_bFloating );
#if (!defined __EXT_MFC_NO_TAB_CONTROLBARS)
        if( pBar->AutoHideModeGet() )
        {
            ASSERT_KINDOF( CExtDockBar, pBar->m_pDockBar );
            CExtDynAutoHideArea * pWndAutoHideArea =
                ((CExtDockBar*)pBar->m_pDockBar)->_GetAutoHideArea();
            ASSERT_VALID( pWndAutoHideArea );
            CExtDynAutoHideSlider * pWndSlider =
                pWndAutoHideArea->GetAutoHideSlider();
            ASSERT_VALID( pWndSlider );
            if( (pWndSlider->GetStyle()&WS_VISIBLE) != 0 )
                pWndSlider->SendMessage( WM_CANCELMODE );
            pWndAutoHideArea->RemoveControlBar( pBar, true );
        } // if( pBar->AutoHideModeGet() )
#endif // (!defined __EXT_MFC_NO_TAB_CONTROLBARS)
        if( pBar->m_pDockBar->IsKindOf(RUNTIME_CLASS(CExtDockBar)) )
        {
#if (!defined __EXT_MFC_NO_TAB_CONTROLBARS)
            if( pBar->m_pDockBar->IsKindOf(RUNTIME_CLASS(CExtDockDynTabBar)) )
            {
                CExtDynTabControlBar * pTabbedBar =
                    STATIC_DOWNCAST(
                        CExtDynTabControlBar,
                        pBar->m_pDockBar->GetParent()
                        );
                LONG nIdx = pTabbedBar->FindControlBar( pBar );
                if( nIdx >= 0 )
                {
                    LONG nSel = pTabbedBar->GetSwitcherSelection();
                    if( nIdx != nSel )
                        pTabbedBar->SetSwitcherSelection( nIdx );
                    pTabbedBar->RemoveSelFromSwitcher();
                } // if( nIdx >= 0 )
            } // if( pBar->m_pDockBar->IsKindOf(RUNTIME_CLASS(CExtDockDynTabBar)) )
#endif // (!defined __EXT_MFC_NO_TAB_CONTROLBARS)
            VERIFY(
                ((CExtDockBar *)pBar->m_pDockBar)->
                    RemoveControlBar( pBar, -1, 0, false )
                );
        }
        else
        {
            VERIFY( pBar->m_pDockBar->RemoveControlBar(pBar) );
        }
    } // else from if( pBar->IsFloating() )
    pDockSite->RemoveControlBar( pBar );
    pBar->m_pDockSite = NULL;
    pBar->m_pDockBar = NULL;
    if( pMiniFrame != NULL )
        pMiniFrame->DestroyWindow();
    else
        pBar->DestroyWindow();
    if( ! bForceNoOptimizeMode )
        CExtDockBar::_OptimizeCircles( pDockSite );
}

But we would recommend you use dynamic control bars which can be easily de-allocated using the CExtDynamicBarSite::BarFree() method. Besides dynamic control bars do not have the following restriction that have simple bars: all the bars whose states were saved before should be created before their state is loaded.

Thanks- everything is working fine except that place of destroyed control bar is not redrawed when bar is docked (no problems when bar is floating).

Darius

This function is oriented for destroying many control bars with several sequential calls. So if the CWnd::GetParentFrame() method called for each control bar (that should be destroyed) returns a pointer to the main frame window, then you should re-compute the main frame’s layout using CFrameWnd::RecalcLayout() method.

Now it working perfectly!
Thank you!