100分，求大神相助，单文档切换时图闪烁（急）

100分，求大神帮助，单文档切换时图闪烁（急！）
我是单文档，被分割为左右两部分，左边是一个treeview，右边是一个Listview，点击左边treeview的Item，右边的视图可以切换问题是我点击左边Item切换时，整个单文档会闪烁，左边和右边都会闪烁一下。代码如下：
void CTreeOptionWnd::OnTvnSelchanged(NMHDR *pNMHDR, LRESULT *pResult)
{//这个函数点击选项发出一个消息
NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;  
  HTREEITEM hTreeItem = GetTreeCtrl().GetSelectedItem(); 
HWND pCWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
  if (hTreeItem == m_hSubItem[0])  
{  
::SendMessage(pCWnd, WM_CHANGEDVIEW, WPARAM(0), 0); //WM_CHANGEDVIEW是我自定义的消息
}  
 
if (hTreeItem == m_hSubItem[1])  
{  
::SendMessage(pCWnd, WM_CHANGEDVIEW, WPARAM(1), 0);  
} 
 
*pResult = 0;
}
自定义消息
ON_MESSAGE(WM_CHANGEDVIEW, OnChangedeView)
OnchangeView 函数是控制切换视图的函数
LRESULT CMainFrame::OnChangedeView( WPARAM wParam, LPARAM lParam )  
{  
   
CCreateContext bContext;  
UINT uiDlgID = (UINT)wParam;  
CRect rc;
//((CView *)m_SplitterWnd.GetPane(0, 1))->GetClientRect(&rc);
GetClientRect(&rc);
 
  CDocument *pDoc = ((CView *)m_SplitterWnd.GetPane(0, 1))->GetDocument();  

  pDoc->m_bAutoDelete = FALSE;  
((CView *)m_SplitterWnd.GetPane(0, 1))->DestroyWindow();  
pDoc->m_bAutoDelete = TRUE;  

switch( uiDlgID )  
{  
case 0:  
bContext.m_pNewViewClass = RUNTIME_CLASS(CFormSetPassword);  
break;  
case 1:  
bContext.m_pNewViewClass = RUNTIME_CLASS(CListControlWnd);  
break; 
default:
break;
}  
bContext.m_pCurrentDoc = pDoc;  
bContext.m_pNewDocTemplate = NULL;  
bContext.m_pLastView = NULL;  
bContext.m_pCurrentFrame = NULL;  
 
if (!m_SplitterWnd.CreateView(0, 1, bContext.m_pNewViewClass, CSize(rc.Width(),rc.Height()), &bContext))
{
return FALSE;
}
//m_SplitterWnd.CreateView(0, 1, bContext.m_pNewViewClass, CSize(rc.Width(),rc.Height()), &bContext);  
CView * pNewView= (CView *)m_SplitterWnd.GetPane(0, 1);
m_SplitterWnd.SetActivePane(0 , 1);
pNewView->SendMessage(WM_INITIALUPDATE, 0, 0); //必须加上这句才能是视图显示
m_SplitterWnd.RecalcLayout();
//m_SplitterWnd.ShowView
RedrawWindow();
//UpdateWindow();
return 0;
}  

求大神帮忙 ，我切换视图时候会闪烁。就是闪一下，跟刷新了一样