modules && type inheritance?

[MM]

>"structures.d" will need to import anything that it needs, so find which 
>derelict import defines GLubyte and add an import line for it in 
>structures.d.

Adding 
import derelict.opengl.gl;
did the trick :)
Note to self > Modules are no C Header files :D
thx.
Would you by chance know whether it is necessary/good programming to use the
opengl types iso D types? :)