How to create a Scilab structure ?

[Vincent]

Hi,

I would like to create a SciLab structure from C code. By scilab structure I 
mean a variable that has some "children", for instance, as outputed by scilab 
:

 a  =
 
   a1: 1
   a2: 2
   a3: 3
   a4: 4

also with structure member instancied by a.a1=1, a.a2=2...
It appears that such object are neither list nor tlist. So I have no idea how 
to produce structure like that...

Regards,
Vincent.