求助　我这个关于OpenGL基于MFC的画线怎么画不出呢？谢谢

#include "stdafx.h"
#include "F.h"#include "FDoc.h"
#include "FView.h"
#include "MainFrm.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif/////////////////////////////////////////////////////////////////////////////
// CFViewIMPLEMENT_DYNCREATE(CFView, CView)BEGIN_MESSAGE_MAP(CFView, CView)
//{{AFX_MSG_MAP(CFView)
ON_WM_CREATE()
ON_WM_CANCELMODE()
ON_WM_DESTROY()
ON_WM_MOUSEMOVE()
ON_COMMAND(ID_BUTTONnurbs, OnBUTTONnurbs)
ON_COMMAND(ID_BUTTONbezier, OnBUTTONbezier)
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CFView construction/destructionCFView::CFView()
{
// TODO: add construction code here
    my_pDC=NULL;
mybezier=FALSE;
mynurbs=FALSE;
}CFView::~CFView()
{
}BOOL CFView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
//  the CREATESTRUCT cs return CView::PreCreateWindow(cs);
}/////////////////////////////////////////////////////////////////////////////
// CFView drawingvoid CFView::OnDraw(CDC* pDC)
{
CFDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
static BOOL bBusy=FALSE;
if(bBusy) return;
bBusy=TRUE;
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
mydraw();
glFinish();
SwapBuffers(wglGetCurrentDC());
bBusy=FALSE;
}/////////////////////////////////////////////////////////////////////////////
// CFView printingBOOL CFView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}void CFView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}void CFView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}/////////////////////////////////////////////////////////////////////////////
// CFView diagnostics#ifdef _DEBUG
void CFView::AssertValid() const
{
CView::AssertValid();
}void CFView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}CFDoc* CFView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CFDoc)));
return (CFDoc*)m_pDocument;
}
#endif //_DEBUG/////////////////////////////////////////////////////////////////////////////
// CFView message handlersBOOL CFView::mypixelformat()
{
 static PIXELFORMATDESCRIPTOR pfd = 
{
        sizeof(PIXELFORMATDESCRIPTOR), 
        1,                             
        PFD_DRAW_TO_WINDOW |           
          PFD_SUPPORT_OPENGL| // support OpenGL
  PFD_DOUBLEBUFFER,             // double buffered
        PFD_TYPE_RGBA,              
        24,                         
        0, 0, 0, 0, 0, 0,           
        0,                          
        0,                          
        0,                          
        0, 0, 0, 0,                 
        32,                         
        0,                          
        0,                          
        PFD_MAIN_PLANE,             
        0,                          
        0, 0, 0                     
    };
    int pixelformat;    if ( (pixelformat = ChoosePixelFormat(my_pDC->GetSafeHdc(), &pfd)) == 0 )
    {
        MessageBox("ChoosePixelFormat failed");
        return FALSE;
    }    if (SetPixelFormat(my_pDC->GetSafeHdc(), pixelformat, &pfd) == FALSE)
    {
        MessageBox("SetPixelFormat failed");
        return FALSE;
    }    return TRUE;
}void CFView::myfirst()
{
  PIXELFORMATDESCRIPTOR pfd;
    int         n;
HGLRC hrc;    my_pDC = new CClientDC(this);    ASSERT(my_pDC != NULL);    if (!mypixelformat())
        return;
    n =::GetPixelFormat(my_pDC->GetSafeHdc());
    ::DescribePixelFormat(my_pDC->GetSafeHdc(), n, sizeof(pfd), &pfd);
    hrc = wglCreateContext(my_pDC->GetSafeHdc());
    wglMakeCurrent(my_pDC->GetSafeHdc(), hrc); GetClientRect(&my_oldRect);
    glClearDepth(1.0f);
    glEnable(GL_DEPTH_TEST);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}int CFView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
if (CView::OnCreate(lpCreateStruct) == -1)
return -1;

// TODO: Add your specialized creation code here
myfirst();
return 0;
}void CFView::OnCancelMode() 
{
CView::OnCancelMode();

// TODO: Add your message handler code here

}void CFView::OnDestroy() 
{
CView::OnDestroy();

// TODO: Add your message handler code here
HGLRC hrc; hrc = ::wglGetCurrentContext();    ::wglMakeCurrent(NULL,  NULL);

    if (hrc)
        ::wglDeleteContext(hrc);    if (my_pDC)
        delete my_pDC;

}
void CFView::OnBUTTONnurbs() 
{
// TODO: Add your command handler code here
mynurbs=!mynurbs;
glClearColor(0.0f,0.0f,1.0f,1.0f);
Invalidate(FALSE);
}void CFView::mydraw()
{
  glTranslatef(0.0f,0.0f,-6.0f);
  if(mybezier) {Mybezier();};
  if(mynurbs){Mynurbs();};
}void CFView::Mynurbs()
{
  glPushMatrix();
    glBegin(GL_LINES);
        glVertex2f(0.0f,0.0f);
        glVertex2f(0.01f,-0.4f);
    glEnd();
glPopMatrix();
}