CAPI question: callbacks return values

Hi

just another stupid question:  are there some conventional return 
values for callbacks?

The examples do not seem to assume any specific one.

Cheers

--
Marco Antoniotti
NYU Courant Bioinformatics Group		tel. +1 - 212 - 998 3488
715 Broadway 10th FL				fax. +1 - 212 - 998 3484
New York, NY, 10003, U.S.A.


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