   [DirectX] [C#] Checklist to draw something
  I'm going crazy here!I'm trying to draw a simple square texture.and I have:1. set the texture in the device2. open stream lock vertex etc3. make world, projection and view matrices4. select vertex format5. draw primitivesbut nothing shows on the screen.I've tried - turning lights on and off- turning zbuffer on and off- moving the camera around to see if it was behind me or something- culling off- near and far planes are very near and far- the scale of the texture should be about right to see it.what else can I check? I ended up with a horrible headache and not advancing anything at all