sane_control_option() confusion

The SANE specification tells me that the form of
sane_control_option is:

SANE_Status
sane_control_option (SANE_Handle h, SANE_Int n, SANE_Action
a,
                      void *v, SANE_Int * i);

Also, it tells me that "[t]his function is used to set
or inquire the 
current value of option number n of the device represented
by handle h."

It is the n that I am confused about. Specifically, what
does n = 0 mean?

Thank You,

Tabor Kelly

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> It is the n that I am confused about. Specifically,
what does n = 0 mean?
0 is the index of the "option count" option. 


-- 
Verso l'Alto !


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