Create splitter Outside OnCreateClient()

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C++

MFC

Hi friends ,
Please help ...

I am creating the mdi application within which i need to split the view
on clicking of the menu item . I am able to split it in on onCreateClient() of CChildFrame as follow .

CSplitterWnd m_splitter ;

if (!m_splitter.CreateStatic(this,1,2))
    {
        return FALSE ;
    }
    if (!m_splitter.CreateView(0,0,RUNTIME_CLASS(CFrmTree),CSize(600,100),pContext))
    {
        return FALSE ;

    }
    if (!m_splitter.CreateView(0,1,RUNTIME_CLASS(CTempClass),CSize(600,100),pContext))
    {
        return FALSE ;

    }

But I dont understand how to split outside OnCreateClient().
For any more information kindly let me know.
Thanks.........