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Can I change the toolbar content with another toolbar resource dynamically?

I tried the code(below), It looks like working well(sometimes, the icons are not shown).

void CToolbartestView::OnButton1()
{
    CMainFrame* pFrame = (CMainFrame*)AfxGetMainWnd();

    pFrame->m_wndToolBar.LoadToolBar(IDR_TOOLBAR1);
    if(pFrame->m_wndToolBar .IsVisible() ){
                pFrame->m_wndToolBar.GetParentFrame()->RecalcLayout();
                pFrame->m_wndToolBar.Invalidate();
                pFrame->m_wndToolBar.UpdateWindow();
            }
}

The icons will be displayed OK if your toolbars have their own unique command identifiers for all their buttons. The alternative approach is to update your command manager from all the toolbar resources and invoke the CExtToolControlBar::SetButtons() and CExtToolControlBar::InitContentExpandButton() methods instead of the CExtToolControlBar::LoadToolBar() method. This will work faster.

Would you help me?
It’s very urgent.

This code doesn’t refresh the toolbar.
The changed icons are drawn when I resize the toolbar by dragging the boundary.

Would you send us your test project which demonstrates the problem so we can figure out what is wrong?