You''re probably not getting points and lines because of:

1) You''ve still got blending enabled, which you may, but probably don''t want.

2) You''ve still got a texture with transparent pixels at 0,0, which is the UV you gave your lines and points. Lines and points will use textures if you tell them to, just like triangles do.

3) You never set any texturestagestates when trying to draw lines and points. The color of lines and points is based on the output of texturestages, just line triangles.

4) Your line is 1 primitive, not 2. It takes 2 points to make a line, just like it takes 3 vertices to make a triangle, but it''s still 1 primitive.

5) As said, you never set the FVF. The FVF is the same as when drawing quads in your case. It just defines your vertex structure, which you''ve made identical to your quads(x,y,z,rhw,diffuse,u,v). Just copy that code from your quad function.

6) That article is really bad. They don''t fully setup texture states, and just assume they''re default. If you render something else that changes states, then render a quad with their technique, the output is not fully defined. Also, locking and drawing each quad? And no warning that it''s just a beginner level tutorial, and that this isn''t what you should really do? Some of these articles need big, bold, flashing, warnings on them.

The FVF is covered by an Anonymous Poster above. Your vertices are of type D3DFVF_XYZRHW | D3DFVF_DIFFUSE | D3DFVF_TEX1.
In DX8: pDev->SetVertexShader(D3DFVF_XYZRHW | D3DFVF_DIFFUSE | D3DFVF_TEX1)
In DX9: pDev->SetFVF(D3DFVF_XYZRHW | D3DFVF_DIFFUSE | D3DFVF_TEX1)

For the texturestagestates... hmmm. How much detail do post.

The color drawn to the backbuffer is based on a the flow through the texture stages. They can be programmed to read textures, use diffuse color, use a constant color, and to mix these in a variety of ways, such as multiplication, addition.

// Setup to mix diffuse and texture color and alpha for quadspDev->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE);pDev->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);pDev->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE);pDev->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE);pDev->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);pDev->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE);pDev->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_DISABLE);pDev->SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_DISABLE);

This says for stage 0:
modulate (multiply - colors are treated as 3 floats from 0 to 1) the texture by the diffuse color. Then it says modulate the texture alpha and diffuse alpha.

Then for stage 1, it says "I''m done".

Odds are for lines and points you don''t want textures, just the diffuse color so you''d do this instead:

// Setup texture stages for diffuse color only, and use diffuse alphapDev->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG2);pDev->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE);pDev->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG2);pDev->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE);pDev->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_DISABLE);pDev->SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_DISABLE);

The number of stages you use will increase as you start doing multitexturing, and complex blending operations. The output of stage 0 and be used as the input to stage 1. The output from stage 1 can be the input to stage 2, and so on.

On modern cards you can also write to a temporary register. ie: Stage 0, calculate something and save it. Stage 1, calculate something entirely different. Stage 2, Modulate Stage 1 with Temp.

What each operation does is covered fairly well in the docs, and in the d3d9types.h file.