代码从控制台程序移到MFC出现有关问题

代码从控制台程序移到MFC出现问题
在控制台程序上就是display和reshape两个，在reshape中重新定义视口。
在MFC中部分代码如下：

C/C++ code

void COpenGLMFCView::OnDraw(CDC* pDC){    COpenGLMFCDoc* pDoc = GetDocument();    ASSERT_VALID(pDoc);    wglMakeCurrent(pDC->m_hDC,m_hRC);    Drawscene();    wglMakeCurrent(pDC->m_hDC,NULL);    // TODO: add draw code for native data here}

C/C++ code

void COpenGLMFCView::Drawscene(){    glClearColor(1,1,1,0);    glClear(GL_COLOR_BUFFER_BIT);    glPointSize(10);    glLoadIdentity();    gluLookAt(0,0,50,0,0,-50,0,1,0);    glBegin(GL_POINTS);        glColor3f(1,0,0);        glVertex3f(0,0,5);        glVertex3f(0,0,-5);    glEnd();    glFlush();}

C/C++ code

void COpenGLMFCView::OnSize(UINT nType, int cx, int cy) {    CView::OnSize(nType, cx, cy);    // TODO: Add your message handler code here    glViewport(0, 0, cx, cy);    glMatrixMode(GL_PROJECTION);    glLoadIdentity();    gluPerspective(60,(double)cx/cy,10,50);    glMatrixMode(GL_MODELVIEW);}