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I’ve overrided OnTabWndClickedItemCloseButton() in class derived from CExtTabPageContainerFlatWnd. When I display some message box in this method (CExtMsgBox::DoModal) , the 1st mouse click is ignored. So i need 2 clicks to close the message box, or drag dialog’s title to move it. Can you check this please? Thank you.

Thank you for reporting this issue. To fix it, please update the source code for the following method:

bool CExtTabWnd::_ProcessMouseClick(
      CPoint point,
      bool bButtonPressed,
      INT nMouseButton, // MK_... values
      UINT nMouseEventFlags
      )
{
      ASSERT_VALID( this );
      if( GetSafeHwnd() == NULL )
            return false;
      if( bButtonPressed )
      {
            CWnd * pWndTestChildFrame = GetParentFrame();
            if( pWndTestChildFrame != NULL && pWndTestChildFrame->IsKindOf( RUNTIME_CLASS( CMDIChildWnd ) ) )
            {
                  CFrameWnd * pWndFrame = pWndTestChildFrame->GetParentFrame();
                  if( pWndFrame != NULL )
                  {
                        CMDIFrameWnd * pWndMDIFrame = DYNAMIC_DOWNCAST( CMDIFrameWnd, pWndFrame );
                        if( pWndMDIFrame != NULL )
                        {
                              CMDIChildWnd * pActive =
                                    pWndMDIFrame->MDIGetActive();
                              if( pWndTestChildFrame != pActive )
                                    ((CMDIChildWnd*)pWndTestChildFrame)->MDIActivate();
                        }
                  }
            }
      } // if( bButtonPressed )
LONG nHitTest = ItemHitTest( point );
      switch( nHitTest )
      {
      case __ETWH_BUTTON_LEFTUP:
      case __ETWH_BUTTON_RIGHTDOWN:
      case __ETWH_BUTTON_SCROLL_HOME:
      case __ETWH_BUTTON_SCROLL_END:
      case __ETWH_BUTTON_HELP:
      case __ETWH_BUTTON_CLOSE:
      case __ETWH_BUTTON_TAB_LIST:
            return OnTabWndClickedButton( nHitTest, bButtonPressed, nMouseButton, nMouseEventFlags );
      default:
            if( nHitTest < __ETWH_TAB_FIRST )
            {
                  OnTabWndMouseTrackingPushedStop();
                  Invalidate();
                  UpdateWindow();
                  return false; //true;
            }
      break;
      }
      ASSERT( nHitTest >= 0 && nHitTest < ItemGetCount() );
      if( bButtonPressed )
            m_ptStartDrag = point;
      else
      {
            if( m_nPushedTrackingButton >= 0 && m_bPushedTrackingCloseButton )
            {
                  CPoint ptCursor;
                  if( ::GetCursorPos( &ptCursor ) )
                  {
                        ScreenToClient( &ptCursor );
                        if( ItemGet( m_nPushedTrackingButton )->CloseButtonRectGet().PtInRect( ptCursor ) )
                        {
                              if( ::GetCapture() == m_hWnd )
                                    ::ReleaseCapture();
                              LONG nPushedTrackingButton = m_nPushedTrackingButton;
                              OnTabWndClickedItemCloseButton( nPushedTrackingButton );
                        }
                  }
                  return true;
            }
      }
      return OnTabWndClickedItem( nHitTest, bButtonPressed, nMouseButton, nMouseEventFlags );
}