Keychain services API and dealing with Keychains other than the default

Question

Hello,
So I've been doing some C work with the Keychain services API. But I can't figure out how to set the Keychain for a function to something other than the default, which is set by passing NULL.
For example,
status = SecKeychainAddGenericPassword (
*NULL, // default keychain*
10, // length of service name
"SurfWriter", // service name
10, // length of account name
"MyUserAcct", // account name
passwordLength, // length of password
password, // pointer to password data
NULL // the item reference
This function is defined here:
http://developer.apple.com/documentation/Security/Reference/keychainservices/Ref erence/reference.html#//apple_ref/c/func/SecKeychainAddGenericPassword
and the data type for the Keychain is here:
http://developer.apple.com/documentation/Security/Reference/keychainservices/Ref erence/reference.html#//appleref/doc/cref/SecKeychainRef
But neither helps me at all for being able to edit a keychain that isn't the default Keychain.
I appreciate any help, thanks.
Message was edited by: Smerky

Answer 1

http://developer.apple.com/documentation/Security/Reference/keychainservices/Ref erence/reference.html#//apple_ref/c/func/SecKeychainOpen