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Dear support team,

Is there any way to modify the styles (e.g. thickness, color) of the border line in CExtDynamicControlBar?

Thanks in advance.

Alan

Customized non client areas of control bars are demonstrated in the TabbedBars sample. The CMainFrame::OnMsgUseCustomNcArea() method in this sample handles the CExtControlBar::g_nMsgCustomNcAreaQuery registered Windows message which is designed both for recomputing and repainting the non client area of resizable control bars.

I did the following but the debugger never runs into the modified function

In CMainFrame.h,

afx_msg LRESULT OnMsgUseCustomNcArea( WPARAM wParam, LPARAM lParam );

In CMainFrame.cpp,

BEGIN_MESSAGE_MAP( CMainFrame, CFrameWnd )
    ON_REGISTERED_MESSAGE( CExtControlBar::g_nMsgCustomNcAreaQuery,    OnMsgUseCustomNcArea)
END_MESSAGE_MAP()

LRESULT CMainFrame::OnMsgUseCustomNcArea( WPARAM wParam, LPARAM lParam ){
    int i = 0; // ******* the programe never reaches this line******
    return 0;
}

Please advice. Thanks a lot.

Regards,
Alan

Please also set the CExtControlBar::g_bUseCustomNcArea global variable to true. This is needed to tell all the CExtControlBar windows to start sending the CExtControlBar::g_nMsgCustomNcAreaQuery message and let your code affect the non-client area of any control bar.

Thanks for your response. I can go to CExtControlBar::g_nMsgCustomNcAreaQuery() now. However, actually what I would like is simply to remove the border lines of a CExtDynamicControlBar. Can add code inside g_nMsgCustomNcAreaQuery() help to achieve this purpose?

On the other hand, I attempted to let CExtControlBar::DoPaintNC( CDC * pDC ) draw nothing but its border lines are still present (in white without any style makeup though).

Is there any way to remove the border lines of a CExtDynamicControlBar like a ribbon bar /page does? Please help. Thanks a lot.

Alan

The message handler for the CExtControlBar::g_nMsgCustomNcAreaQuery registered Windows message should look like:

LRESULT CMainFrame::OnMsgUseCustomNcArea( WPARAM wParam, LPARAM lParam )
{
    ASSERT_VALID( this );
    lParam;
CExtControlBar::CUSTOM_NC_AREA_QUERY_DATA * pCNAQD =
        CExtControlBar::CUSTOM_NC_AREA_QUERY_DATA::FromWPARAM( wParam );
    ASSERT( pCNAQD != NULL );
    ASSERT_VALID( pCNAQD->m_pBar );
    if( pCNAQD->m_pBar->IsFixedMode() )
        return 0;
    if( pCNAQD->m_hDcDraw != NULL )
    { // if rendering query
        pCNAQD->m_bQueryHandled = false;
    } // if rendering query
    else
    { // if metric update query
        pCNAQD->m_bQueryHandled = true;
        pCNAQD->m_pBar->_SeparatorWidthSet( 0 );
        pCNAQD->m_pBar->_SeparatorHeightSet( 0 );
    } // if metric update query
    return 0;
}

Please also update the source code for the CExtControlBar::_SeparatorHeightSet() method in the .../Prof-UIS/Src/ExtControlBar.cpp file to fix a small assertion bug:

void CExtControlBar::_SeparatorHeightSet( INT nSeparatorHeight )
{
    ASSERT_VALID( this );
    ASSERT( nSeparatorHeight >= 0 ); /* previously in 2.60 this line was ASSERT( nSeparatorHeight > 0 ); */
    m_nSeparatorHeight = nSeparatorHeight;
}