setting file attributes through a C program

[rohan_ak1]

Hello everyone,
I need to change attributes of a file through a C program.I got file attributes using the stat structure.Now I need to set these attributes.What API's should I use?

Thank you

[matsp]

http://www.hmug.org/man/2/CHMOD.php

(Yes, that's the same name as the command-line tool).

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Mats