I just noticed that you cannot use your enums as argument or return types of 
function if you model your IDL-file on the example from the documentation

enum e {A=1, B=2, C=4};

you have to use either

enum _e {...};
typedef enum _e e;

or even better (since it will save a C function call even without a smart 
optimizer)

typedef enum {...} e;

to get the full benefit of the translation to a Caml enumerated type.

This is of course a ( -- if you think about it long enough -- trivial) 
consequence of the silly struct and enum syntax of C, but I think that this
idiom should probably be mentioned in the documentation.

Yours, Florian.

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