an error of a MFC program

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MFC

OpenGL

Hi,I have wrote a MFC project and I have compile and debuged the project.But the output result is not right. I am a freshman on computer programming.Please help me solve this problem.Thank you!

This is the part of the "practiceView.cpp".

void CpracticeView::OnDraw(CDC* /*pDC*/)
{
	CpracticeDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: 在此处为本机数据添加绘制代码
	DrawScence();
}

int CpracticeView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;

	// TODO:  在此添加您专用的创建代码
	m_pDC = new CClientDC(this);	// get device context
	if( m_pDC == NULL )
	{
		::AfxMessageBox( "fail to get device context" );
		return FALSE;
	}

	if( !SetupPixelFormat() )	// setup pixel format
	{
		::AfxMessageBox( "SetupPixelFormat failed" );
		return FALSE;
	}
	
	// get rendering context
	if( ( m_hRC = wglCreateContext(m_pDC->GetSafeHdc()) ) == 0 )
	{
		::AfxMessageBox( "wglCreateContext failed" );
		return FALSE;
	}

	// make current rendering context
	if( wglMakeCurrent(m_pDC->GetSafeHdc(), m_hRC) == FALSE )
	{
		::AfxMessageBox( "wglMakeCurrent failed" );
		return FALSE;
	}
	return 0;
}

void CpracticeView::OnDestroy()
{
	CView::OnDestroy();

	// TODO: 在此处添加消息处理程序代码
	if(wglMakeCurrent(0,0)==FALSE)
		::AfxMessageBox("wglMakeCurrent failed");
	if(m_hRC && (wglDeleteContext(m_hRC)==FALSE))
		::AfxMessageBox("wglDeleteContext failed");
	if( m_pDC)
		delete m_pDC;
}

BOOL CpracticeView::OnEraseBkgnd(CDC* pDC)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	//return CView::OnEraseBkgnd(pDC);
	return TRUE;
}

void CpracticeView::OnSize(UINT nType, int cx, int cy)
{
	CView::OnSize(nType, cx, cy);

	// TODO: 在此处添加消息处理程序代码
	glViewport(0,0,cx,cy);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluOrtho2D(0,500,0,500);
}
BOOL CpracticeView::SetupPixelFormat(PIXELFORMATDESCRIPTOR* pPFD)
{
	PIXELFORMATDESCRIPTOR pfd = {
		sizeof( PIXELFORMATDESCRIPTOR ),
		1,
		PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL,
		PFD_TYPE_RGBA,
		24,
		0, 0, 0, 0, 0, 0,
		0, 0, 0, 
		0, 0, 0, 0, 
		16,
		0, 0, 
		PFD_MAIN_PLANE,
		0, 0, 0, 0 };

	int pixelformat;	
	PIXELFORMATDESCRIPTOR* pPFDtoUse;
	pPFDtoUse = (0 == pPFD)? &pfd : pPFD;
	
	if ( 0 == ( pixelformat = ::ChoosePixelFormat( m_pDC->GetSafeHdc(), pPFDtoUse ) ) ) 
	{
		::AfxMessageBox( "ChoosePixelFormat failed" );
		return FALSE;
	}
	if ( FALSE == ::SetPixelFormat( m_pDC->GetSafeHdc(), pixelformat, pPFDtoUse ) ) 
	{
		::AfxMessageBox( "SetPixelFormat failed" );
		return FALSE;
	}

	return TRUE;
}
void CpracticeView::DrawScence(){
	glClearColor(1.0f,1.0f,1.0f,1.0f);
	glClear(GL_COLOR_BUFFER_BIT);

	glColor3f(1.0f,0.0f,0.0f);
	glBegin(GL_POLYGON);
	    glVertex2f(100,100);
	    glVertex2f(100,200);
	   glVertex2f(200,200);
	   glVertex2f(200,100);
	  glEnd();
	 glFlush();
}

I have already add opengl32.lib ,glu32.lib,glut32.lib.


The output result should have a red rectangle,but my result have not any graphics.
Do you kown where the error is?