I want to switch multiple CSplitterWnd in MFC SDI project.
There are two CSplitterWnd members in CMainFrame.

    CSplitterWnd m_wndSplitter;
    CSplitterWnd2 m_wndSplitter2;

CSplitterWnd2 is derived from CSplitterWnd class.

And i created both splitters in CMainFrame::OnCreateClient like this.

> BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT /*lpcs*/,
    CCreateContext* pContext)
{
    m_wndSplitter.CreateStatic(this,1, 2);
    m_wndSplitter.CreateView(0,0, RUNTIME_CLASS(CSplitterWindowView), CSize(300,300), pContext);
    m_wndSplitter.CreateView(0,1, RUNTIME_CLASS(CMyView1), CSize(300,300), pContext);

    m_wndSplitter2.CreateStatic(this, 1, 2);
    m_wndSplitter2.CreateView(0, 0, RUNTIME_CLASS(CMyView2), CSize(300, 300), pContext);
    m_wndSplitter2.CreateView(0, 1, RUNTIME_CLASS(CMyView3), CSize(300, 300), pContext);

    return TRUE;
}

This is what the screen looks like when i run it.
showing m_wndSplitter2
it only shows m_wndSplitter2.
Now i want to switch to m_wndSplitter through the menu.
When i click the menu, the screen should be like this.
showing m_wndSplitter

i tried ShowWindow(SW_HIDE) and ShowWindow(SW_SHOW) but it doesn’t work.

void CMainFrame::OnMenuSplitter1() //menu event handler
{
    m_wndSplitter.ShowWindow(SW_SHOW);
    m_wndSplitter2.ShowWindow(SW_HIDE);
}

the screen after call event handler was same as [showing m_wndSplitter2].