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Leopard Technical Q&As
Core Foundation is a framework that provides fundamental software services. Developers can use Core Foundation to build cross-platform applications and can share code and data among frameworks, libraries, and applications. Core Foundation provides abstractions for common data types, facilitates internationalization through Unicode string storage, and offers a suite of utilities.

A guided introduction and learning path for developers new to Core Foundation.   Essential information for developers using the Core Foundation framework.   C API references organized by framework.
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Core Animation properties and Reference Counting (HTML)
QA1565: Describes a discrepancy between the property declarations in Core Animation and the actual behavior.
Resource Management 2008-11-24
Programmatically causing restart, shutdown and/or logout (HTML) (日本語 HTML)
QA1134: Describes how to programmatically cause restart, shutdown, sleep or logout.
Events & Other Input, Process Management, Resource Management 2008-09-24
Disabling Processor Cores on a Multi-Core System (HTML) (日本語 HTML)
QA1141: Describes how to disable processor cores on a multi-core system for testing purposes.
Performance 2008-09-16
Expanding Tilde-based paths (HTML)
QA1549: Demonstrates how to resolve tilde-based relevant paths.
File Management 2008-09-08
Registering and unregistering for sleep and wake notifications (HTML)
QA1340: Explains how applications can register and unregister for sleep and wake notifications on Mac OS X.
Resource Management 2008-08-08
Getting a Packet Trace (HTML) (日本語 HTML)
QA1176: Lists tools available for looking at the network packets on the wire.
Internet & Web, Networking 2008-06-03
Bonjour Printer Subtype for HTTP (HTML)
QA1555: Describes how printer vendors can register their bonjour service such that Safari can see them.
Networking 2008-03-25
Advertising a Bonjour service on a specific set of networking interfaces. (HTML)
QA1513: Explains how to register a Bonjour service only on a specific set of networking interfaces.
Networking 2007-02-12
How can I identify the runtime environment, Carbon or Cocoa, of the current application? (HTML)
QA1372: Identifies the runtime environment of the application. Useful only for plugins, frameworks, input methods, etc.
Process Management 2006-11-07
Programmatically Performing an Open Directory Search (HTML)
QA1462: A short guide on how to programmatically search Open Directory for matching attribute values within records.
Data Management 2006-09-11
Problems getting Bonjour TXT record information (HTML)
QA1389: Explains why you might have problems retrieving TXT record information from a CFNetServiceRef or NSNetService.
Networking 2005-07-06
Using language-tagged QuickTime UserData text APIs with CFStrings (HTML)
QA1410: Describes how to use language-tagged QuickTime UserData text APIs with CFStrings and TextEncodings.
Text & Fonts 2005-02-11
CFBundleIdentifier and user application access (HTML)
QA1373: Describes the role of CFBundleIdentifier in limiting a user's application access.
Design Guidelines 2005-02-08
Resolves may return an IPv6 address in Panther (HTML)
QA1298: Explains why you get an IP address of 0.0.0.0 when resolving a Bonjour service.
Networking 2005-01-10
Bonjour enforces the TXT record format in Panther (HTML)
QA1306: Explains how mDNSResponder enforces the proper TXT record format in Panther.
Networking 2004-07-14
Updating the TXT record of a Bonjour service (HTML)
QA1302: Explains how to update a Bonjour TXT record while running on either Jaguar or Panther.
Networking 2004-07-14
Discovering all advertised Bonjour service types (HTML)
QA1337: Explains how to discover all Bonjour service types being advertised on the local network.
Networking 2004-06-01
Downloading through a proxy server in Mac OS X (HTML)
QA1296: Explains when downloading through a proxy server will work, and when it will fail.
Networking 2003-10-29
URL Access vs. CFNetwork (HTML)
QA1291: Explains when to choose URL Access or CFNetwork when downloading files from within your application.
Networking 2003-10-29
CFXML to CFPropertyListRef (and back!) (HTML) (日本語 HTML)
QA1208: Describes to how save and restore a CFPropertyListRef to and from an XML file.
Data Management, Events & Other Input, Resource Management, Text & Fonts 2003-08-29
Internet Connect Speed (HTML) (日本語 HTML)
QA1165: Describes how to get the modem connection speed from the System Configuration framework dynamic store.
Networking 2003-03-26
Accessing HTTPS Proxy Settings (HTML) (日本語 HTML)
QA1234: Describes how to programatically access Secure Web Proxy information.
Networking 2003-02-19
Converting to Precomposed Unicode (HTML) (日本語 HTML)
QA1235: Describes how to convert a string to precomposed Unicode.
Text & Fonts 2003-02-07
Power Management; Policy Maker vs. Power Controller (HTML) (日本語 HTML)
QA1121: Describes the differences between a Power Management Policy Maker and a Power Management Power Controller.
Events & Other Input, Process Management 2002-02-13
Getting the User and Computer Name (HTML)
QA1078: Describes how to get the user and computer name on Mac OS X.
Networking 2001-10-30
Setting environment variables for user processes (HTML)
QA1067: Tells how to set environment variables for user processes.
Data Management, Design Guidelines, Process Management, Resource Management 2001-10-25
HID Manager Event Data Underruns (HTML)
QA1038: Explains how to correctly handle HID Manager event queue data underruns.
Process Management 2001-06-13
The "chosen" node in the device tree (HTML)
HW88: Describes how to find the "chosen" node in the Open firmware device tree.
Networking 2000-09-05
OTScheduleDeferredTask When Task Running (HTML) (日本語 HTML)
NW52: Describes what happens when you use OTScheduleDefferedTask to schedule a task that is running.
Process Management, Resource Management 1997-10-13
Changing the TCP Window Size (HTML)
NW47: Describes how to change the TCP window size in Open Transport.
Networking, Performance 1997-03-14
T_DATA_REQ vs M_DATA TPI Message Blocks (HTML) (日本語 HTML)
NW42: Explains why OT passes data to a TPI module using M_DATA message blocks instead of M_PROTO+T_DATA_REQ.
Networking 1996-10-25