初始化glew，创建OpenGL渲染上下文

 void RegisterWinDowClass(HINSTANCE hInstance,std::string className,WNDPROC proc)
 {
     WNDCLASS wndClass;
     wndClass.cbClsExtra = ;
     wndClass.cbWndExtra = ;
     wndClass.hbrBackground = (HBRUSH)::GetStockObject(GRAY_BRUSH);
     wndClass.hCursor = ::LoadCursor(NULL,IDC_ARROW);
     wndClass.hIcon = ::LoadIcon(NULL,IDI_APPLICATION);
     wndClass.hInstance = hInstance;
     wndClass.lpfnWndProc = proc;
     wndClass.lpszClassName = className.c_str();
     wndClass.lpszMenuName = NULL;
     wndClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC | CS_DBLCLKS;
     ::RegisterClass(&wndClass);
 }

 bool InitGlewLib(HINSTANCE hInstance)
 {
     RegisterWinDowClass(hInstance,"Fake",MainWinProc);

     HWND hWnd = ::CreateWindow("Fake","OpenGL",WS_OVERLAPPEDWINDOW,
         CW_USEDEFAULT,CW_USEDEFAULT,width,heigtht,
         NULL,NULL,hInstance,NULL);

     HDC hDC = ::GetDC(hWnd);
     HGLRC hRc;
     ::PIXELFORMATDESCRIPTOR pfd;
     //memset(&pfd,0,sizeof(pfd));

     //pfd.nVersion = 1;
     //pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
     //pfd.dwFlags = PFD_DOUBLEBUFFER | PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW;
     //pfd.iPixelType = PFD_TYPE_RGBA;
     //pfd.cColorBits = 32;
     //pfd.cDepthBits = 32;
     //pfd.iLayerType = PFD_MAIN_PLANE;       

     //int iPixelFormat = ::ChoosePixelFormat(hDC,&pfd);
     //if (iPixelFormat == 0)
     //{
     //    DestroyWindow(hWnd);
     //    return false;
     //}
     /**************************************************************************

     1，注册fake窗口的class，如果和主窗口是同名的class，会使初始化失败
     2，选择1号格式索引作为临时索引
     3，根据设备上下文创建渲染上下文
     4，绑定到当前上下文
     5，初始化glew
     6，解除上下文绑定，销毁窗口
     **************************************************************************/

     int iPixelFormat = ;
     if (::SetPixelFormat(hDC,iPixelFormat,&pfd))
     {
         hRc = ::wglCreateContext(hDC);
         if (::wglMakeCurrent(hDC,hRc))
         {
             GLenum retVal = glewInit();
             wglMakeCurrent(NULL,NULL);
             wglDeleteContext(hRc);
             DestroyWindow(hWnd);
             return retVal == GLEW_OK;
         }
         wglDeleteContext(hRc);
         DestroyWindow(hWnd);
     }
     else
     {
         DestroyWindow(hWnd);
     }

     return false;
 }

 bool InitOpenGL(HWND hWnd,HINSTANCE hInstance)
 {
     if (!InitGlewLib(hInstance))
     {
         ::MessageBox(NULL,"glew init Error",NULL,MB_OK);
         return ;
     }

     if(!WGLEW_ARB_create_context || !WGLEW_ARB_pixel_format)
         return false;
     HDC hDC = ::GetDC(hWnd);
     PIXELFORMATDESCRIPTOR pfd;
     //memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
     //pfd.nSize        = sizeof(PIXELFORMATDESCRIPTOR);
     //pfd.nVersion   = 1;
     //pfd.dwFlags    = PFD_DOUBLEBUFFER | PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW;
     //pfd.iPixelType = PFD_TYPE_RGBA;
     //pfd.cColorBits = 32;
     //pfd.cDepthBits = 32;
     //pfd.iLayerType = PFD_MAIN_PLANE;

     /**************************************************************************

     1，填充像素格式属性 （缓冲区的初始化）
     2，填充上下文属性 （用于设置指定OpenGL版本）
     3，根据像素格式属性选择设备上下文合适像素格式索引。wglChoosePixelFormatARB(...)
     4，将得到的像素格式索引绑定到设备上下文。SetPixelFormat(...)
     5，根据设备上下文，及上下文属性设置创建一个OpenGL渲染上下文。wglCreateContextAttribsARB(...)
     6，将渲染上下文与设备上下文绑定 wglMakeCurrent(...)

     **************************************************************************/

     const int iPixelFormatAttributeList[] =
     {
         WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,                        // 绘制到窗口
         WGL_SUPPORT_OPENGL_ARB,GL_TRUE,                            // 支持OpenGL
         WGL_ACCELERATION_ARB ,WGL_FULL_ACCELERATION_ARB ,        // 硬件加速
         WGL_DOUBLE_BUFFER_ARB,GL_TRUE,                            // 双缓冲
         WGL_PIXEL_TYPE_ARB,WGL_TYPE_RGBA_ARB,                    // RGBA
         WGL_COLOR_BITS_ARB,,                                    // 颜色位数32
         WGL_DEPTH_BITS_ARB,,                                    // 深度位数24
         WGL_STENCIL_BITS_ARB,,                                    // 模板位数8
         WGL_SWAP_METHOD_ARB, WGL_SWAP_EXCHANGE_ARB,                // 双缓冲swap方式直接交换
         WGL_SAMPLES_ARB, ,                                // 4倍抗锯齿

     };

     const int iContextAttributeList[] =
     {
         WGL_CONTEXT_MAJOR_VERSION_ARB,,                        // 主版本号
         WGL_CONTEXT_MINOR_VERSION_ARB,,                        // 次版本号
         WGL_CONTEXT_FLAGS_ARB,WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,

     };

     int iPixelFormat,iNumFormat;
     wglChoosePixelFormatARB(hDC,iPixelFormatAttributeList,NULL,
         ,&iPixelFormat,(UINT *)&iNumFormat);

     if (!SetPixelFormat(hDC,iPixelFormat,&pfd))
     {
         //int error = ::GetLastError();
         return false;
     }
     HGLRC hRC = wglCreateContextAttribsARB(hDC,NULL,iContextAttributeList);
     if (hRC)
     {
         ::wglMakeCurrent(hDC,hRC);
         return true;
     }
     return false;
 }