I forgot which buffer holds all the pixels.

[K.I.L.E.R]

I need it so I can apply filters on my programs and stuff.

Front and back buffers hold pixels, should I read from the back buffer then modify the contents in the buffer which will be stored in system memory and then re enter it back into the back buffer?

 

[Rodéric]

Render To Texture seems the best way to add post processing, you'll be able to use the texture (which might contain your scene) along with a Fragment Shader.

Frame buffer (which can be double buffered) contain pixel and depth + stencil information, and is on board (in VRAM).

 

[K.I.L.E.R]

Yeh, I only want pixel info.

Render to texture it is.

I know render to texture is possible through DirectX 9, how about GDI+?

Only reason I ask is because I want to test a few of my algorithms and I don't really care how I do it as long as I can do it.