Hi guysPlease check this code for C++ Direct X 9 and tell me why I get artefacts lines on preview frames ?I need this preview frames to make trailing effects. Otherwise, the code runs well. pD3D9 = Direct3DCreate9(D3D_SDK_VERSION); D3DDISPLAYMODE mode; pD3D9->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &mode); memset(&pD3dpp, 0, sizeof(pD3dpp)); pD3dpp.BackBufferCount = 1; pD3dpp.BackBufferFormat = D3DFMT_