SharpFont | Pure managed TTF / OTF reader and renderer

What are the exact usage differences between the two functions glframebuffertexture and glbindtexture in OpenGL.

To put into context, I am using OpenTK to write a custom lightweight UI using OpenGL for an embeded machine, which uses lots of framebuffers and respective textures for different components in the UI. Internally the framebuffers are tracked using a stack as buffer contents can be drawn into the "parent" buffer (or if no parent the screen space).

Im having a hard time trying to get the calls in the right order and im wondering if i have got confused with when I need to bind a texture to a frame buffer and when I need to assign a texture to a frame buffer.

I have read the docs on these functions but they dont really explain the relationships between these functions in their context with the frame buffer.

Im basically ending up with nothing being rendered back to screen.

For example if im rendering text with SharpFont (FreeType binding lib) I have one framebuffer for the whole rendered string and one framebuffer to render each character to.

This is the general sequence of how I believe the calls are to be made in this example

1. Starting at FB0 (Screen space),

2. Create FB 1,

3. Setup FB 1 (bind to FB 1) with TX 1 (Create then Bind to then attach),

4. Bind back to FB0,

5. Bind to FB1 (to start rendering to),

6. Create FB2,

7. Setup FB 2 (bind to FB 2) with TX 2 (Create then Bind to then attach), (including rendered character pixel data),

8. Bind Back to FB1,

9. Bind to TX2

10. Render TX2 (supposedly) with quad

11. Repeat at 7 for next character until end

12. Bind Back to FB0

13. Render TX1 (supposedly) with quad.

FrameBuffer (UI Object)