// On the click of the button, OnNewView will get invoked.
BOOL MyView::OnNewView()
{
    GetParentFrame()->SendMessage(WM_COMMAND, UM_CHANGENEWVIEW);
    return TRUE;
}

void RFSMDIChildWnd::SwitchToNewView()
{
	CRuntimeClass* pNewViewClass = RUNTIME_CLASS(CNewView);
	
	if(pNewViewClass)
		ReplaceView(pNewViewClass);
	else
		AfxMessageBox("Failed to Create New View");
}

ReplaceView(CRuntimeClass *pViewClass)
{
  CCreateContext context;
  CView * pCurrentView;    
  
   if ((pCurrentView= this->GetActiveView())==NULL)
     return FALSE;               
  
  if ((pCurrentView->IsKindOf(pViewClass))==TRUE)
     return TRUE;
           
   CDocument * pDoc= pCurrentView->GetDocument();
   
    BOOL bAutoDelete=pDoc->m_bAutoDelete;
  	pDoc->m_bAutoDelete=FALSE; 
	
    // Delete existing view 
    pCurrentView->DestroyWindow();

    // restore flag  
    pDoc->m_bAutoDelete=bAutoDelete;

    //Create a new View
	CView * pNewView = (CView *) pViewClass->CreateObject();

    // Redraw the new view
   
   context.m_pNewViewClass=pViewClass;
   context.m_pCurrentDoc=pDoc;
   context.m_pNewDocTemplate=NULL;
   context.m_pLastView=NULL;
   context.m_pCurrentFrame=this;
                             

   if (pNewView == NULL)
	{
    	TRACE1("Warning: Dynamic create of view type %Fs failed\n",
				pViewClass->m_lpszClassName);
		return FALSE;
	}
	
    if (!pNewView->Create(NULL, NULL, WS_CHILD,
		CRect(0,0,0,0), this, AFX_IDW_PANE_FIRST, &context))
		{
	    	TRACE0("Warning: couldn't create view for frame\n");
			return FALSE;  // programmer can assume FALSE return value 
			               // from this function means that there 
			               //isn't a view
		}                                      

	// Attach new view
    //pDoc->AddView(pNewView);

   // WM_INITIALUPDATE is define in AFXPRIV.H		
   pNewView->SendMessage(WM_INITIALUPDATE, 0, 0); 
   
   RecalcLayout();                
   
   pNewView->UpdateWindow();
   
   SetActiveView(pNewView);
   
   pNewView->PostMessage(RFSAppsView::UM_UPDATEVIEW, (WPARAM) 0, (LPARAM) 0);

   return TRUE;
}

Im getting error in 
if (!pNewView->Create(NULL, NULL, WS_CHILD,
		CRect(0,0,0,0), this, AFX_IDW_PANE_FIRST, &context))
		{
	    	TRACE0("Warning: couldn't create view for frame\n");
			return FALSE;  // programmer can assume FALSE return value 
			               // from this function means that there 
			               //isn't a view
		}