Is there a way to know if NGUI is present at compilation time?

[Pecomac]

I'm developing an architecture to build games. In order to isolate complexities I plan to wrap a basic version of NGUI and Unity GUI. In order for the compiled code to work with or without NGUI I would need to know if there is a kind of preprocessor or whatever I could use to know if NGUI is present in the customer's computer. Is such a way to detect NGUI?

Thx in advance!

[devomage]

assuming that checking the path isnt an option...  use keyword "reflection" with your searches.

1. Debug.Log(Type.GetType("NGUIToolz"));
2. Debug.Log(Type.GetType("NGUITools"));
3.  

http://answers.unity3d.com/questions/587982/check-if-class-exists-and-invoke-its-method.html

[Pecomac]

Thx a lot for the idea. I was Looking for some kind of preprocessor directive but the reallity is that probably it's more about execution time. I'll try your idea and I anticípate it may work well for me.
BR and thx for your prompt response!