gistfile1.cpp

        PIXELFORMATDESCRIPTOR pixelFormatDesc;
        memset(&pixelFormatDesc, 0, sizeof(PIXELFORMATDESCRIPTOR));

        pixelFormatDesc.nSize = sizeof(pixelFormatDesc);
        pixelFormatDesc.nVersion = 1;
        pixelFormatDesc.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
        pixelFormatDesc.iPixelType = PFD_TYPE_RGBA;
        pixelFormatDesc.cColorBits = 24;
        pixelFormatDesc.cDepthBits = 16;
        pixelFormatDesc.iLayerType = PFD_MAIN_PLANE;

        HDC deviceContext;
        if (!(deviceContext = GetDC(hWnd)))
        {
            std::wstringstream ss;
            ss << "Can't Create A GL Device Context. (0x" << std::hex << GetLastError() << ')';
            MessageBox(nullptr, ss.str().c_str(), L"ERROR", MB_OK | MB_ICONEXCLAMATION);
            return nullptr;
        }

        int pixelFormat;
        if (!(pixelFormat = ChoosePixelFormat(deviceContext, &pixelFormatDesc)))
        {
            std::wstringstream ss;
            ss << "Can't Find A Suitable PixelFormat. (0x" << std::hex << GetLastError() << ')';
            MessageBox(nullptr, ss.str().c_str(), L"ERROR", MB_OK | MB_ICONEXCLAMATION);
            return nullptr;
        }

        if (!SetPixelFormat(deviceContext, pixelFormat, &pixelFormatDesc))
        {
            std::wstringstream ss;
            ss << "Can't Set The PixelFormat. (0x" << std::hex << GetLastError() << ')';
            MessageBox(nullptr, ss.str().c_str(), L"ERROR", MB_OK | MB_ICONEXCLAMATION);
            return nullptr;
        }

        HGLRC renderContext;
        if (!(renderContext = wglCreateContext(deviceContext)))
        {
            MessageBox(nullptr, L"Can't Create A GL Rendering Context.", L"ERROR", MB_OK | MB_ICONEXCLAMATION);
            return nullptr;
        }

        if (!wglMakeCurrent(deviceContext, renderContext))
        {
            MessageBox(nullptr, L"Can't Activate The GL Rendering Context.", L"ERROR", MB_OK | MB_ICONEXCLAMATION);
            return nullptr;
        }

        return new Engine(hWnd, deviceContext, renderContext);