if (FAILED(result))
{
  DXTRACE_MSG("Failed to get the swapchain backbuffer !");
  return false;
}

// Set the scan line ordering and scaling to unspecified.
swapChainDesc.BufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
swapChainDesc.BufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;

// Discard the back buffer contents after presenting.
swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;

// Don't set the advanced flags.
swapChainDesc.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH; // Alt+Enter from fullscr to windowed

result = swapChain_->GetBuffer(0, __uuidof(ID3D10Texture2D), (LPVOID*)&backBufferTexture);

result = swapChain_->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&backBufferTexture);

dx11demobase.cpp(64): error C2601: 'featureLevels' : local function definitions are illegal

result = swapChain_->GetBuffer(0, __uuidof(ID3D10Texture2D), (LPVOID*)&backBufferTexture);

Vector3 near = new Vector3(mouseX, mouseY, 0);
Vector3 far = new Vector3(mouseX, mouseY, 1);
               
near.Unproject(device.Viewport, device.Transform.Projection, device.Transform.View,device.Transform.World );

far.Unprojectdevice.Viewport, device.Transform.Projection, device.Transform.View,device.Transform.World );

bool intersects = Mesh[i].Intersect(near, far, out closestIntersection);

window = CreateWindowEx(
  WS_EX_TOPMOST,
  "STATIC",
  "Game",
  WS_POPUP|WS_VISIBLE |WS_VISIBLE
  ,0,0,winWidth,winHeight,
  0,0,GetModuleHandle(0),0);

// és hagyom a windowed flagot TRUE-on ?

D3DPRESENT_PARAMETERS d3dpp;

d3dpp.Windowed = TRUE;
d3dpp.BackBufferWidth = winWidth;
d3dpp.BackBufferHeight = winHeight;

//Definiálom a vertex buffert
LPDIRECT3DVERTEXBUFFER9 vertexBuffer;
//....... kód itt csak a szokásos windows cucc

void initD3D(HWND hWnd)
{
       //.....itt létrehozom az objectet+ a devicet
       //......
       //megkreálom a vertexBuffert
      d3dDevice->CreateVertexBuffer(4*sizeof(CUSTOMVERTEX),
                                                                 D3DUSAGE_WRITEONLY,
                                                                 D3DFVF_CUSTOMVERTEX,
                                                                 D3DPOOL_MANAGED,
                                                                 &vertexBuffer,
                                                                 NULL)
     CUSTOMVERTEX vertices[]{
                                                        {-1.0f,-1.0f,1.0f,/*a színe*/}
                                                        {-1.0f,1.0f,1.0f,/*a színe*/}
                                                        {1.0f,1.0f.1.0f,/*a színe*/}
                                                        {1.0f,-1.0f,1.0f,/*a színe*/}
                                                        }
}

void render()
{
        CUSTOMVERTEX * pVertices
        vertexBuffer->Lock(0,sizeof(vertexBuffer),(void**)&pVertices,0)
        //ui: a 2. paramétert lehetne 0 is de nekem így könnyebben olvasható a kód
        memcpy(pVertices,vertices,sizeof(vertices));//ezt megúszhatnám azzal hogy itt helyben adom be neki  az infót de túl kényelmes vagyok
        d3dDevice->Clear(0,NULL,D3DCLEAR_TARGET,D3DCOLOR_XRBG(0,125,125),1.0f,0)
        d3dDevice->BeginScene();
                  //itt megpróbálom kirajzolni a képernyőre a vertex buffert
        d3dDevice->EndScene();
}