line width

I read it''s not possible in DX. (Additional notes)
http://www.flipcode.com/articles/article_objectoutline.shtml

but some cat wrote a routine
http://www.flipcode.com/cgi-bin/msg.cgi?showThread=COTD-TexturedLinesInD3D&forum=cotd&id=-1

Here''s an idea to do it in hardware for double or quadrupled sized lines.
Render all your lines to a texture [rendertarget] that''s a power of 2 smaller than your screen size. Then draw the quad fullsized and hardware will scale it up, giving you extra thick lines. (it may look jaggedy but that''s the style yo)

1) ID3DXLine.

2) Drawing as quads (like ID3DXLine) are how wide lines are achieved internally with other APIs, and drivers.

Thanks quack and S1CA, im going to read the article and try out the ID3DLine now.