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Technical Q&As are short question and answer formatted pages that provide answers to questions frequently received at Apple Developer Technical Support.

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Viewing multi-page PDF files (HTML) ()
QA1247: How to draw each page of a multi-page PDF document using the QuickTime movie importers.
QuickTime 2003-03-05
WaitMouseUp documentation errata (HTML)
QA1008: Specifies the correct behavior of the WaitMouseUp function.
Carbon 2001-02-27
Was that a path I just saw? (HTML)
HW101: Describes the Open Firmware path that is occasionally shown at boot time.
Device Drivers, Hardware 2000-10-06
WebObjects applications crashing on NT using IIS (HTML)
WOV01: Explanation and workaround for random crashing with WebObjects patch 2 on Windows NT with IIS.
WebObjects 2000-10-30
What are configuration variables in Open Firmware? (HTML) ()
HW38: Defines the configuration variables in Open Firmware.
Device Drivers, Hardware 1999-02-15
What are generic names in Open Firmware? (HTML) ()
HW34: Documents the generic names in Open Firmware.
Device Drivers, Hardware 1999-02-15
What are NewWorld and Open Firmware version 3? (HTML) ()
HW33: Describes "NewWorld project" and tells what part Open Firmware version 3 plays.
Hardware 1999-02-15
What are snag keys in Open Firmware? (HTML) ()
HW35: Explains Open Firmware snag keys, including examples of their function.
Hardware, Mac OS X Server, Networking, Security 1999-02-15
What depth should I put in an Image Description? (HTML) ()
QA1183: Describes how to select the correct value for the depth field of an image description.
QuickTime 2002-08-15
What is a 'scsz' resource in Java? (HTML) ()
Deprecated - JAVA15: Describes the what the scsz resource is for Mac OS Classic Java.
Java 1999-05-17
What is a CardBus host bus adapter HBA? (HTML)
HW79: Explains what a CardBus host bus adapter (HBA) is and discusses its implementation on the Macintosh.
Device Drivers, Hardware 1999-11-15
What is a tokenizer? (HTML) ()
HW58: Defines a tokenizer.
Device Drivers, Hardware 1999-03-29
What is an Open Firmware devalias? (HTML)
HW99: Describes devaliases in Open Firmware.
Device Drivers, Hardware 2000-10-06
What is an Open Firmware phandle, and why can't I access it from the Mac OS? (HTML)
HW76: Explains an "Open Firmware phandle" and why it is inaccessible from the Mac OS.
Device Drivers, Hardware 1999-11-15
What is JAR caching? (HTML)
Deprecated - JAVA27: Describes the jar caching for JDK 1.1.X on Mac OS Classic.
Java 2000-10-06
What is meant by 1 machine mode verses 2 machine mode with respect to Open Firmware? (HTML) ()
HW36: Documents 1 machine mode vs. 2 machine mode in Open Firmware.
Hardware 1999-02-15
What is SetMovieDefaultDataRef? (HTML) ()
QTMTB48: Describes the routine SetMovieDefaultDataRef and includes sample code showing how to use it.
QuickTime 1997-03-14
What is the "dump" word and how do I use it? (HTML)
HW68: Describes the function of the Open Firmware word "dump" and how it can be used.
Device Drivers, Graphics & Imaging, Hardware, Mac OS X Server, Music & Audio, Networking, Performance, QuickTime 1999-10-11
What is the minimal set of Carbon Events I need to override in order to implement a simple custom push button? (HTML) ()
QA1210: Details the minimal set of Carbon Events needed to implement a simple custom push button HIView.
Carbon 2002-11-12
What is the return stack in Open Firmware and can I use it? (HTML)
HW67: Describes the purpose of the Open Firmware return stack and how developers can use it.
Device Drivers, Hardware 1999-10-11
What is the word "see" and how do I use it to help me find what a word does? (HTML)
HW72: Explains the function and use of the Open Firmware word "see".
Hardware 1999-10-11
What is unsolicited status? (HTML) ()
FW03: Explains the meaning and usage of the SBP-2 unsolicited status message.
Device Drivers, Hardware 1999-05-17
What numeric base is the default for the Open Firmware user interface? (HTML)
HW65: Describes how the default numeric base used by the Open Firmware user interface is hexadecimal.
Device Drivers, Graphics & Imaging, Hardware, Mac OS X Server, Music & Audio, Networking, Performance, QuickTime, Security 1999-10-11
When to use PCMCIA, PC Card, and CardBus (HTML)
HW77: Explains the differences between PCMCIA, PC Card, and CardBus.
Device Drivers, Graphics & Imaging, Hardware, Music & Audio, Networking, QuickTime 1999-11-15
Where do QuickTime extension files reside? (HTML)
QTW100: Describes where to place QuickTime extension files on Win 95/98/2000/NT systems.
QuickTime 2000-09-05
Where is dlopen? (HTML) ()
QA1180: Describes how to dynamically link to libraries and plug-ins, typically done with dlopen.
Darwin 2002-08-19
Where should I install my help book, and how does Help Viewer locate it? (HTML)
QA1022: Describes how to set up your application to work with Apple's Help Viewer.
User Experience 2001-04-09
Which Machines Support Driver Services Library and the MP Nanokernel? (HTML) ()
HW63: Lists the systems that do and don't support the Driver Services Library and the MP Nanokernel.
Device Drivers, Hardware 1999-07-12
Why am I drawing directly to the screen? (HTML)
QA1015: Explains why drawing to a window's backbuffer can affect the upper left corner of the screen instead.
Carbon, Graphics & Imaging, Performance 2004-02-19
Why are my Core Graphics calls drawing upside down? (HTML)
QA1009: Explains why CoreGraphics drawing comes out upside down relative to QuickDraw drawing.
Graphics & Imaging 2001-04-11
Why aren't my tracking rects working? (HTML)
QA1355: Describes a common mistake in setting up cursor-tracking rectangles.
Cocoa 2004-12-02
Why did the name of the PCI bridge change? (HTML) ()
HW59: Explains the name change of the PCI bridge to the generic name "pci" in Open Firmware.
Device Drivers, Graphics & Imaging, Hardware, Mac OS X Server, Music & Audio, Networking, Performance 1999-03-29
Why didn't I boot from the CD? (HTML)
HW98: Describes the behavior of holding down the "c" key at boot time.
Device Drivers, Hardware 2000-10-06
Why does -stringByTrimmingCharactersInSet: give me an empty string result when it shouldn't? (HTML) ()
QA1202: Why -stringByTrimmingCharactersInSet: sometimes returns an empty string result in Mac OS X 10.2.x when it shouldn't.
Cocoa 2002-10-15
Why does logging keep my Printer Module from working? (HTML) ()
Deprecated - QA1182: Describes some problems with standard printf logging in a Printer Module on Jaguar.
Device Drivers, Graphics & Imaging, Hardware, Printing 2002-11-06
Why does my identity matrix look strange? (HTML) ()
QA1227: Discusses the MatrixRecord structure and QuadToQuadMatrix function.
QuickTime 2003-01-15
Why doesn't my Scrolling Text Box control work in a compositing window? (HTML)
QA1324: Explains why some older controls do not function properly in compositing windows and points to a replacement.
Carbon 2003-11-13
Why don't all of my PDE localizations show up in all applications? (HTML) ()
QA1185: Explains why some PDE localizations might not appear in all applications.
Device Drivers, Graphics & Imaging, Hardware, Printing 2002-10-16
Why isn't my edit text box in my Navigation dialog's custom area working on 10.3? (HTML)
QA1315: Explains a bug in the Mac OS X 10.3 Navigation Services Custom Area involving the EditText and its work around.
Carbon, User Experience 2003-10-28
Why isn't my Static Text Control deactivating when my other controls are? (HTML) ()
QA1125: Explains why a Static Text Control is not deactivating when the other controls are.
Carbon 2002-03-11
Window Manager and EraseRect (HTML)
Deprecated - QD26: Why WindowManager causes a flicker using EraseRect and provides a solution for this problem.
Carbon, Graphics & Imaging, User Experience 1995-09-15
Workaround for Asynchronous SCSIAction Crashes (HTML) ()
Deprecated - QA1129: Explains how to workaround asynchronous SCSIAction crashes on Mac OS X.
Device Drivers, Hardware 2002-03-21
Working with Configuration Variables (HTML) ()
QA1119: Explains how to delete a specific Open Firmware configuration variable without using Command-Option-P-R.
Darwin, Device Drivers, Hardware 2002-02-13
Working with groups and folder references in Project Builder (HTML)
QA1077: Explains how to work with groups and folder references in Project Builder
Tools 2001-09-25
X11 FAQ (HTML) ()
QA1232: Frequently Asked Questions about using Apple's X Window System (X11) implementation.
Carbon, Darwin, Porting 2003-11-17
Yielding Time Without Getting Events (HTML)
PS06: Describes how to yield processor time to other processes without accepting user interface events.
Carbon 2000-10-16