error C2065: 'classCDivisionView' : undeclar报错

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext) 
{
// TODO: Add your specialized code here and/or call the base class
m_wndSplitter.CreateStatic(this, 2, 2);
m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CDivisionView),CSize(200,200), pContext);
m_wndSplitter.CreateView(0, 1, RUNTIME_CLASS(CDivisionView),CSize(200,200), pContext);
m_wndSplitter.CreateView(1, 0, RUNTIME_CLASS(CDivisionView),CSize(200,200), pContext);
m_wndSplitter.CreateView(1, 1, RUNTIME_CLASS(CDivisionView),CSize(200,200), pContext);
return TRUE;

//turn CFrameWnd::OnCreateClient(lpcs, pContext);
}
提示错误：E:\我的程序\MFC\视图分割\MainFrm.cpp(113) : error C2065: 'classCDivisionView' : undeclared identifier
该如何是好 晕ing

包含CDivisionView的头文件