pContext此结构负责传递创建document/view/frame的过程中的状态信息CCreateContext context; context.m_pCurrentDoc = GetDocument();//与文档建立关联 context.m_pCurrentFrame = GetTopLevelFrame(); context.m_pLastView = this; context.m_pNewDocTemplate = NULL;pContext->m_pNewViewClass//runtime class of view to be create or NULL
context.m_pCurrentDoc = GetDocument();//与文档建立关联
context.m_pCurrentFrame = GetTopLevelFrame();
context.m_pLastView = this;
context.m_pNewDocTemplate = NULL;pContext->m_pNewViewClass//runtime class of view to be create or NULL