you can use the ID3D10Device::IASetPrimitiveTopology method, link: http://msdn.microsoft.com/en-us/library/bb173590(VS.85).aspx that way you can set how vertices on a buffer are drawn. setting it like a line list it will read 2 vertices at a time from the buffer, and draw a line with them. pDevice->IASetPrimitiveTopology( ...

make sure when your setting up your DXGI_SWAP_CHAIN_DESC, that you set the .BufferCount field for at least 1 (double buffering), can be more for triple buffering, etc.

use the ID3D10Device::ClearRenderTargetView method, link: http://msdn.microsoft.com/en-us/library/bb173539(VS.85).aspx example, float color[4] = { 0.5f, 0.5f, 0.5f, 1.0f }; pDevice->ClearRenderTargetView( pTargetView, color ); (...) pSwapChain->Present( 0, 0 );

i have been following your articles for quite some time now, helped me a lot. awsome job really :)

maybe ID3D10ShaderReflectionType::GetMemberTypeByName will do it?