has_key

Looks whether the key file has the key key in the group group_name.

Note that this function does not follow the rules for Error strictly; the return value both carries meaning and signals an error. To use this function, you must pass a Error pointer in throws, and check whether it is not null to see if an error occurred.

Language bindings should use get_value to test whether or not a key exists.

Parameters:

this	a KeyFile
group_name	a group name
key	a key name

Returns:

true if key is a part of group_name, false otherwise