在MFC的文档模式中，为了用户界面友好，以多种形式现实用户数据，我们需要切分视图窗口。

 

 

在SDI模式中若需要切分窗口步骤如下：

 

step1： 在CMainFrame类中添加窗口切分变量CSplitterWnd m_wndSplitter, m_wndSplitterRight.

step2：在CMainFrame类中重载CFrameWnd的成员函数OnCreateClient

step2：在OnCreateClient函数中添加如下代码

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)
{
  // TODO: Add your specialized code here and/or call the base class
  
  // Get the client rect of application
  CRect rect;
  this->GetClientRect(&rect);
  // Width of the client rect
  int nWidth = rect.right - rect.left;
  //height of the client rect
  int nHeight = rect.bottom - rect.top;
#define FRACTION  4
  // split the view into 1 row 2 cols
  m_wndSplitter.CreateStatic(this, 1, 2); 
  // create a view in 0 row 0 col
  m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CProjectFormView), CSize(nWidth / FRACTION, 0), pContext);
  
  // split the view in 0 row 1 col into 2 rows 1 col
  m_wndSplitterRight.CreateStatic(&m_wndSplitter, 2, 1, WS_CHILD | WS_VISIBLE, m_wndSplitter.IdFromRowCol(0, 1));
  // create two views in the subview
  m_wndSplitterRight.CreateView(0, 0, RUNTIME_CLASS(CClientView), CSize(0, nHeight / FRACTION * 3), pContext);
  m_wndSplitterRight.CreateView(1, 0, RUNTIME_CLASS(CMessageView), CSize(0, 0), pContext);
  
  // mentions : the function must return TRUE.
  return TRUE;
  //return CFrameWnd::OnCreateClient(lpcs, pContext);
}