Well, I did. None of the tutorials worked, though. It'd always complain about certain functions.
I'm sure I need to specify a version but I don't know what version.
Edit: I don't know why but versions are suddenly working. Maybe there was a trailing character.
Edit2: Now it's not working...
Edit3: Oh, I only support GLSL 1.3.
Edit4: Okay, I can't do this. I can't set textures.