xcode 3.2: how can i add an include dir to my project?

I can't seem to find in Xcode how can I 开发者_如何学JAVAadd an include dir to my project.

how can I do so ?

thanks!

---

1. Select your project in the "Groups & Files" panel on the left hand side
2. Open the "Get Info" window (Cmd + I)
3. Select the "Build" tab
4. Find "Header Search Paths"
5. Add the include dirs.