Pixelformat e rendering context
vVa fatto subito dopo la creazione della finestra. Override (esplicito) della Create()
vBOOL MyOpenGLView::Create(LPCTSTR lpszClassName,
LPCTSTR lpszWindowName, DWORD dwStyle, const RECT& rect,
CWnd* pParentWnd, UINT nID, CCreateContext* pContext)
v{
v  if( ! CView::Create(lpszClassName, lpszWindowName, dwStyle, rect, pParentWnd, nID, pContext))
return false;
v
v  m_pDC = new CClientDC(this);
v  ASSERT(m_pDC != NULL);
v
v  // Setta il pixel format
v  if (!SetupPixelFormat(m_pDC)) return FALSE;
v  // Crea e setta il contesto OPENGL
v  m_hrc = wglCreateContext(m_pDC->GetSafeHdc());
v  if(m_hrc==NULL){
v AfxMessageBox("OpenGL contest fail");
v return FALSE;
v }
v