VC添加类

在其中选new
在随后的对话框中输入CMyView
在base Class里选一个基类//可以随便选
CView CEditView都行
cx.m_pNewViewClass=RUNTIME_CLASS(CMyView);
这一句一般是由VC自动生成不需要自己写
//出现在下面这个函数里
CFrameWnd* CDocTemplate::CreateNewFrame(CDocument* pDoc, CFrameWnd* pOther)
{
if (pDoc != NULL)
ASSERT_VALID(pDoc);
// create a frame wired to the specified document

ASSERT(m_nIDResource != 0); // must have a resource ID to load from
CCreateContext context;
context.m_pCurrentFrame = pOther;
context.m_pCurrentDoc = pDoc;
context.m_pNewViewClass = m_pViewClass;
context.m_pNewDocTemplate = this;

if (m_pFrameClass == NULL)
{
TRACE0("Error: you must override CDocTemplate::CreateNewFrame.\n");
ASSERT(FALSE);
return NULL;
}
CFrameWnd* pFrame = (CFrameWnd*)m_pFrameClass->CreateObject();
if (pFrame == NULL)
{
TRACE1("Warning: Dynamic create of frame %hs failed.\n",
m_pFrameClass->m_lpszClassName);
return NULL;
}
ASSERT_KINDOF(CFrameWnd, pFrame);

if (context.m_pNewViewClass == NULL)
TRACE0("Warning: creating frame with no default view.\n");

// create new from resource
if (!pFrame->LoadFrame(m_nIDResource,
WS_OVERLAPPEDWINDOW | FWS_ADDTOTITLE, // default frame styles
NULL, &context))
{
TRACE0("Warning: CDocTemplate couldn't create a frame.\n");
// frame will be deleted in PostNcDestroy cleanup
return NULL;
}

// it worked !
return pFrame;
}

我不知道你要做什么
如果是动态创建的话只要
在.h文件加宏
DECLARE_DYNCREATE(CMyView)
在.cpp加
IMPLEMENT_DYNCREATE(CMyView, CView)