[Help] Direct3D Device from c++

[dealerchen]

Ok what im basicly tried to do is trying to render stuff from an injected c# dll on the unmanaged c++ Direct3DDevice9. (EndScene is already hooked so no i wont ask about how to do that)

What i first tried is creating an c# Device Version out of the c++ Pointer wich actually worked, I could use Clear to fill my screen with a color. But i failed on drawing on it.
(Code Copied from Quick DirectX tutorial in c# from Apoc as i dont have my code anymore.. but it was basicly the same):

            CustomVertex.TransformedColored[] vertices = new CustomVertex.TransformedColored[3];

            vertices[0].Position = new Vector4(150f, 100f, 0f, 1f);
            vertices[0].Color = Color.Red.ToArgb();
            vertices[1].Position = new Vector4(this.Width / 2 + 100f, 100f, 0f, 1f);
            vertices[1].Color = Color.Green.ToArgb();
            vertices[2].Position = new Vector4(250f, 300f, 0f, 1f);
            vertices[2].Color = Color.Yellow.ToArgb();

            device.VertexFormat = CustomVertex.TransformedColored.Format;
            device.DrawUserPrimitives(PrimitiveType.TriangleList, 1, vertices);

it didnt do an exception but nor displayed the Triangle on the screen.
I think the problem is that the new Triangle is stored in managed memory and not unmanaged memory from the c++ device?

My 2nd Idea is to get all Function pointers of the c++ device and try it that way but before im putting hours of work in this i wanted to ask if there is an easier way to do so. maybe i was on the right way and just missed something.

i would be thankful for any help

edit:
another idea i just had while thinking about it again:
could it be possible that the drawing worked BUT the triangle is somewhere i cant see it cause of the world camara settings?

[Apoc]

If you're drawing to WoW, you're going to need to setup quite a few transforms. The camera system in WoW is honestly; kinda screwy. They use mostly vertex shading, so the actual DX drawing layers are fun to work with.

[dealerchen]

Thanks for your answer.
Im still not quiet sure if my first attempt was that wrong.
But if YOU already say its screwy then i should most likly start with something simpler then WoW to learn in deep how directx works (I only know basics from few tutorials in "own" created forms or using opengl engine funcs (hl1))

still i dont really want to give up.
i also found http://www.mmowned.com/forums/wow-me...ame-world.html wich also talks about the matrix settings being wrong and theirfor not showing up anything.

Am i on the right way or should i drop it till i know more about it?