Wiley-World.of.Warcraft.Programming.A.Guide.and.Reference.for.Creating.WoW.Addons

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210 Part II ■ Programming in World of WarcraftShowing Item Tooltips Using OnEnter and OnLeaveHaving the item buttons print something to the chat window is great, butit’s not very useful; instead you can display the item’s tooltip. You canaccomplish this using the GameTooltip object provided by the default userinterface. Figure 12-1 shows the tooltip for the Death Knight spell BloodPresence.Figure 12-1: GameTooltip showing tooltip for Blood PresenceTo show a tooltip, you typically use the following process:1. Call the GameTooltip:SetOwner() method, passing in the frame objectthat will temporarily own the tooltip, a string that tells the system howto anchor the tooltip, and optionally a set of offsets.2. Call one of the many Set methods to tell the tooltip what information todisplay. In this case, you’ll use the SetHyperlink method, passing in theitem hyperlink.3. Show the tooltip by calling GameTooltip:Show().But first you need to store the item link in a place where the script handlercan access it. Open BagBuddy.lua and change the update loop at the endof BagBuddy_Update() to the following (the highlighted lines are the onlychanges):for i = 1 , 24 dolocal button = BagBuddy.items[i]local entry = sortTbl[i]if entry then-- There is an item in this slotbutton.link = entry.linkbutton.icon:SetTexture(entry.texture)
Chapter 12 ■ Interacting with Widgets 211if entry.count > 1 thenbutton.count:SetText(entry.count)button.count:Show()elsebutton.count:Hide()endif entry.quality > 1 thenbutton.glow:SetVertexColor(GetItemQualityColor(entry.quality))button.glow:Show()elsebutton.glow:Hide()endbutton:Show()elsebutton.link = nilbutton:Hide()endendDuring the iteration of the loop, you just update the link key in the frametable using the link stored in the item entry. If there isn’t an item to displaythe button, you clear the value from the frame table. Next, you need toupdate the script handler functions. Replace the definitions of the OnEnter andOnLeave handlers with the following:function BagBuddy_Button_OnEnter(self, motion)if self.link thenGameTooltip:SetOwner(self, “ANCHOR_TOPRIGHT“)GameTooltip:SetHyperlink(self.link)GameTooltip:Show()endendfunction BagBuddy_Button_OnLeave(self, motion)GameTooltip:Hide()endIn the OnEnter handler, you first check to see if the button is set to displayan item. Then you tell the tooltip to anchor itself to the top right of the itembutton, and set it to display the item. The corresponding OnLeave script simplyhides the tooltip.If you load the addon and run the BagBuddy_Update() function, you shouldbe able to mouse over the items in BagBuddy to display item tooltips.Figure 12-2 shows one such tooltip.
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A Guide and Reference for Creating
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World of Warcraft® Programming: A
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CreditsAcquisitions EditorScott Mey
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xAcknowledgmentsI’d first like to
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xiiContents at a GlanceChapter 13 R
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xivContentsUsing History to Make Ch
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xviContentsExtending Tables with Me
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xviiiContents## Title: 127## Notes:
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xxContentsInvestigating UIPanelTemp
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xxiiContentsAdding an OnEvent Handl
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xxivContentsPreparing for the Token
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xxviContentsWriting an OnUpdate Fun
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xxviii ContentsSummary 496The Code
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xxxContentsChapter 28 API Categorie
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xxxii ContentsTrade Skill Functions
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xxxiv ContentsRequesting Data Befor
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IntroductionSince World of Warcraft
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Introduction xxxixPart II discusses
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CHAPTER1Programming for Worldof War
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Chapter 1 ■ Programming for World
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CHAPTER2Exploring Lua BasicsLua is
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Chapter 2 ■ Exploring Lua Basics
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40 Part I ■ Learning to ProgramTh
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42 Part I ■ Learning to ProgramEm
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44 Part I ■ Learning to ProgramAs
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46 Part I ■ Learning to ProgramWh
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48 Part I ■ Learning to Programwh
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50 Part I ■ Learning to ProgramWh
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CHAPTER4Working with TablesKeeping
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Chapter 4 ■ Working with Tables 5
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CHAPTER5Advanced Functions andContr
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CHAPTER7Learning XMLAs mentioned in
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Chapter 7 ■ Learning XML 113XML T
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Chapter 7 ■ Learning XML 115docum
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Chapter 7 ■ Learning XML 119When
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Chapter 7 ■ Learning XML 121Summa
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CHAPTER8Anatomy of an AddonAs discu
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Chapter 8 ■ Anatomy of an Addon 1
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CHAPTER9Working with Frames, Widget
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260 Part II ■ Programming in Worl
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CHAPTER14Tracking Damage withCombat
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Chapter 14 ■ Tracking Damage with
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CHAPTER15Taking Action with SecureT
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Chapter 15 ■ Taking Action with S
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CHAPTER16Binding Keys and Clicksto
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Chapter 16 ■ Binding Keys and Cli
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338 Part III ■ Advanced Addon Tec
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CHAPTER18Responding to Graphic Upda
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CHAPTER21Responding to the Combat L
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CHAPTER22Creating Scroll FramesWhen
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Chapter 22 ■ Creating Scroll Fram
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self:SetValueStep(1.0)self:SetValue
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CHAPTER24Scanning and ConstructingT
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Chapter 24 ■ Scanning and Constru
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CHAPTER25Taking Protected Actionin
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Chapter 25 ■ Taking Protected Act
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PartIVReferenceIn This PartChapter
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540 Part IV ■ ReferenceThis notat
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542 Part IV ■ ReferenceAPI Meta-T
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544 Part IV ■ ReferenceRAID—Spe
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546 Part IV ■ Referencezero inten
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548 Part IV ■ ReferenceDigits 7-1
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550 Part IV ■ ReferenceRepresents
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552 Part IV ■ Referenceitemdata
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554 Part IV ■ Reference5. Epic (p
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556 Part IV ■ Referencemouseover
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558 Part IV ■ ReferenceConfirmati
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560 Part IV ■ ReferenceThe Muted
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564 Part IV ■ ReferenceUsable fol
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566 Part IV ■ ReferenceAfter call
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568 Part IV ■ ReferenceCalendarCo
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570 Part IV ■ ReferenceReturns:mo
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572 Part IV ■ ReferenceCalendarCo
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574 Part IV ■ ReferenceCalendarDe
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576 Part IV ■ ReferenceinviteType
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578 Part IV ■ ReferenceCalendarEv
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584 Part IV ■ Referencetexture—
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586 Part IV ■ ReferencependingInv
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588 Part IV ■ Referenceday—Day
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590 Part IV ■ ReferenceReturns:..
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592 Part IV ■ ReferenceOnly appli
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594 Part IV ■ ReferenceCanComplai
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596 Part IV ■ ReferenceCanGuildDe
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598 Part IV ■ ReferenceReturns:ca
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600 Part IV ■ ReferenceReturns:en
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602 Part IV ■ ReferenceProtectedP
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604 Part IV ■ ReferenceArguments:
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608 Part IV ■ ReferenceBlizzard U
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610 Part IV ■ ReferenceClearLFGAu
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612 Part IV ■ ReferenceautoReturn
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614 Part IV ■ ReferenceCloseBattl
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616 Part IV ■ ReferenceFires the
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618 Part IV ■ ReferenceCombatLogC
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620 Part IV ■ ReferenceCOMBATLOG_
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622 Part IV ■ ReferenceUsable bet
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624 Part IV ■ ReferenceCreateMacr
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626 Part IV ■ ReferenceDeclineNam
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630 Part IV ■ ReferenceThe list o
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632 Part IV ■ ReferenceEnableSpel
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634 Part IV ■ ReferenceUsable fol
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640 Part IV ■ ReferenceGMSurveySu
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642 Part IV ■ Referencequantity
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644 Part IV ■ ReferenceThe toolti
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646 Part IV ■ Referencelocal acti
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652 Part IV ■ ReferenceGetArenaTe
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654 Part IV ■ ReferenceReturns:in
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656 Part IV ■ ReferencebuyoutPric
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664 Part IV ■ ReferenceExample:--
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666 Part IV ■ Referencebreakenden
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668 Part IV ■ ReferencevehicleY
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670 Part IV ■ ReferenceReturns:ac
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672 Part IV ■ ReferenceReturns:li
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674 Part IV ■ ReferenceGetCVarMin
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676 Part IV ■ ReferenceReturns:ch
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678 Part IV ■ ReferenceGetChatWin
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680 Part IV ■ ReferenceCR_CRIT_TA
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682 Part IV ■ Referenceenable—1
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684 Part IV ■ Reference-- oops, i
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688 Part IV ■ ReferenceReturns:ti
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690 Part IV ■ ReferenceGetCurrent
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692 Part IV ■ ReferencesubType—
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696 Part IV ■ ReferenceoffhandExp
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700 Part IV ■ ReferenceGetGlyphSo
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702 Part IV ■ ReferenceThis funct
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704 Part IV ■ ReferencenumWithdra
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706 Part IV ■ ReferenceGetGuildEv
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708 Part IV ■ ReferenceReturns:ye
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710 Part IV ■ Referencestationery
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712 Part IV ■ Referencetexture—
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714 Part IV ■ ReferenceReturns:di
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716 Part IV ■ ReferenceGetInvento
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718 Part IV ■ ReferenceGetInvento
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720 Part IV ■ ReferenceExample:_,
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724 Part IV ■ Referencefor stat,
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726 Part IV ■ ReferenceReturns:ma
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728 Part IV ■ ReferenceisLeader
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730 Part IV ■ ReferenceGetLatestC
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732 Part IV ■ ReferenceGetLootRol
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734 Part IV ■ ReferenceGetMacroIn
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736 Part IV ■ ReferenceGetMapInfo
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738 Part IV ■ ReferenceNot all pa
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740 Part IV ■ ReferenceitemCount
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742 Part IV ■ ReferenceBREATH—U
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744 Part IV ■ ReferenceChatFrame1
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746 Part IV ■ ReferenceIf the giv
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748 Part IV ■ ReferenceisFull—1
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750 Part IV ■ ReferenceGetNumComp
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752 Part IV ■ ReferenceGetNumFrie
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754 Part IV ■ Referenceindex—In
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756 Part IV ■ ReferenceOnly valid
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758 Part IV ■ ReferenceGetNumSave
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760 Part IV ■ Referenceinspect—
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762 Part IV ■ ReferenceOnly valid
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764 Part IV ■ ReferenceReturns:ch
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766 Part IV ■ ReferenceNote: GetP
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768 Part IV ■ ReferenceReturns:na
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770 Part IV ■ Referencecasting a
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772 Part IV ■ Referenceelseif ( l
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774 Part IV ■ ReferenceGetQuestLo
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782 Part IV ■ Reference“notread
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784 Part IV ■ ReferenceGetRestSta
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786 Part IV ■ ReferenceNote the p
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788 Part IV ■ Referencelocked—
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790 Part IV ■ ReferenceGetSelecte
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792 Part IV ■ ReferenceReturns th
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794 Part IV ■ ReferenceA Bind on
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796 Part IV ■ ReferenceGetSpellCo
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800 Part IV ■ Referencepet—The
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802 Part IV ■ ReferenceReturns:te
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806 Part IV ■ ReferenceExample:Ge
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808 Part IV ■ ReferenceTotem func
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810 Part IV ■ ReferenceGetTradeSk
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812 Part IV ■ ReferenceGetTradeSk
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814 Part IV ■ ReferenceplayerReag
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818 Part IV ■ ReferenceGetTrainer
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820 Part IV ■ ReferenceFor trade
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822 Part IV ■ ReferenceReturns:re
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824 Part IV ■ ReferencehasVertexS
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826 Part IV ■ ReferenceoffHandExp
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828 Part IV ■ ReferencedynamicToo
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832 Part IV ■ ReferenceGuildInfoR
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834 Part IV ■ ReferenceUsed by th
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836 Part IV ■ ReferenceNon-Blizza
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842 Part IV ■ ReferenceReturns:co
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844 Part IV ■ ReferenceIsDressabl
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846 Part IV ■ ReferenceIsFactionI
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848 Part IV ■ Referenceprint(name
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850 Part IV ■ ReferenceIsInventor
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852 Part IV ■ ReferenceReturns:mo
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854 Part IV ■ Reference‘‘outd
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856 Part IV ■ ReferenceReturns:in
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858 Part IV ■ ReferenceIsSelected
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860 Part IV ■ ReferenceReturns:is
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862 Part IV ■ Referenceunit—A u
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864 Part IV ■ ReferenceItemHasRan
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866 Part IV ■ ReferenceItemTextNe
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868 Part IV ■ ReferenceKBQuery_Be
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870 Part IV ■ ReferenceReturns:ca
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874 Part IV ■ ReferenceINSECURE
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876 Part IV ■ ReferenceLOOT_OPENE
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878 Part IV ■ ReferenceMac OS X o
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880 Part IV ■ ReferenceMac OS X o
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882 Part IV ■ ReferenceProtectedM
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884 Part IV ■ ReferenceMay cause
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886 Part IV ■ ReferencePetRenameR
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888 Part IV ■ ReferencePickupEqui
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890 Part IV ■ ReferencePickupPlay
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894 Part IV ■ ReferencePromoteToL
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896 Part IV ■ ReferenceFires the
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898 Part IV ■ ReferenceRemoveChat
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900 Part IV ■ ReferenceRequestBat
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902 Part IV ■ ReferenceResetViewR
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906 Part IV ■ ReferenceOutput inc
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908 Part IV ■ ReferenceUsable aft
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910 Part IV ■ Referencetarget (op
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912 Part IV ■ Referencez-“zone
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914 Part IV ■ ReferenceAdapts the
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916 Part IV ■ ReferenceSetCVarSet
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918 Part IV ■ ReferenceUsed by th
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920 Part IV ■ ReferenceCursorTest
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930 Part IV ■ ReferenceOverride b
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932 Part IV ■ Referencekey—A ke
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934 Part IV ■ ReferenceSetRaidSub
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936 Part IV ■ ReferenceSetSelecte
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938 Part IV ■ Reference“BACKGRO
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940 Part IV ■ ReferenceThe defaul
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942 Part IV ■ ReferenceShowContai
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954 Part IV ■ ReferenceProtectedT
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956 Part IV ■ ReferenceReturns:dX
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962 Part IV ■ ReferenceUnitAffect
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968 Part IV ■ ReferenceThe second
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972 Part IV ■ Reference2—Unit i
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978 Part IV ■ ReferenceUnitIsFeig
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980 Part IV ■ ReferenceReturns:is
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982 Part IV ■ ReferenceUnitIsUnit
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986 Part IV ■ ReferenceReturns:ra
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988 Part IV ■ Referencename—The
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990 Part IV ■ ReferenceUnlike sim
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994 Part IV ■ ReferenceProtectedR
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996 Part IV ■ ReferenceCauses aim
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998 Part IV ■ ReferenceVoiceGetCu
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1000 Part IV ■ ReferenceLua APIda
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1002 Part IV ■ Reference’ChatEd
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1004 Part IV ■ ReferenceLua APIfr
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1006 Part IV ■ ReferenceLua APIgs
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1008 Part IV ■ Referencewill iter
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1010 Part IV ■ ReferenceLua APIRe
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1012 Part IV ■ ReferenceLua APIra
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1014 Part IV ■ Referenceseterrorh
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1016 Part IV ■ ReferenceLua APIsq
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1018 Part IV ■ Referencestrjoin(
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1020 Part IV ■ ReferenceArguments
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1022 Part IV ■ ReferenceLua APIFo
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1024 Part IV ■ ReferenceLua APIRe
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1026 Part IV ■ ReferenceGetAchiev
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1028 Part IV ■ ReferenceIsUsableA
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1030 Part IV ■ ReferenceGetMaxAre
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1032 Part IV ■ ReferenceGetNumBan
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1034 Part IV ■ ReferenceGetNumBat
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1036 Part IV ■ ReferenceGetCVarDe
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1038 Part IV ■ ReferenceCalendarE
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1040 Part IV ■ ReferenceCalendarI
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1042 Part IV ■ ReferenceChannelUn
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1044 Part IV ■ ReferenceDoEmote
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1046 Part IV ■ ReferenceQuit—At
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1048 Part IV ■ ReferenceGetContai
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1050 Part IV ■ ReferenceCursorHas
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1052 Part IV ■ ReferenceGetFuncti
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1054 Part IV ■ ReferenceGetSelect
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1056 Part IV ■ ReferenceGetGuildB
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1058 Part IV ■ ReferenceGetGuildT
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1060 Part IV ■ ReferenceGetSpellL
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1062 Part IV ■ ReferenceCursorCan
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1064 Part IV ■ ReferenceGetItemFa
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1066 Part IV ■ ReferenceIsControl
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1068 Part IV ■ ReferenceLooking F
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1070 Part IV ■ ReferenceLootSlotI
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1072 Part IV ■ Referencetinsert
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1074 Part IV ■ ReferenceSecureCmd
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1076 Part IV ■ ReferenceGetMapCon
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1078 Part IV ■ ReferenceModified
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1080 Part IV ■ ReferencePitchUpSt
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1082 Part IV ■ ReferenceParty Fun
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1084 Part IV ■ ReferenceGetPetFoo
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1086 Part IV ■ ReferenceConfirmBi
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1088 Part IV ■ ReferenceUnitChara
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1090 Part IV ■ ReferenceGetGossip
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1092 Part IV ■ ReferenceGetQuestL
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1094 Part IV ■ ReferenceRaid Func
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1096 Part IV ■ Referenceissecure
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1098 Part IV ■ ReferenceGetSocket
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1100 Part IV ■ ReferenceIsAttackS
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1102 Part IV ■ ReferenceGetManaRe
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1104 Part IV ■ ReferenceGetNumTal
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1106 Part IV ■ ReferenceTracking
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1108 Part IV ■ ReferenceGetTradeS
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1110 Part IV ■ ReferenceIsTrainer
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1112 Part IV ■ ReferenceUnitInBat
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1114 Part IV ■ ReferenceGetCurren
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1116 Part IV ■ ReferenceVehicleAi
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1118 Part IV ■ ReferenceDisplayCh
Page 1163 and 1164:
CHAPTER29Widget ReferenceTo respond
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Chapter 29 ■ Widget Reference 112
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1278 Part IV ■ ReferenceADDON_ACT
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1280 Part IV ■ ReferenceCALENDAR_
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1282 Part IV ■ ReferenceCHAT_MSG_
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1284 Part IV ■ ReferenceCORPSE_OU
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1286 Part IV ■ ReferenceGUILDBANK
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1288 Part IV ■ ReferenceKNOWLEDGE
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1290 Part IV ■ ReferenceOPEN_TABA
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1292 Part IV ■ ReferencePLAYER_EN
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1294 Part IV ■ ReferenceQUEST_LOG
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1296 Part IV ■ ReferenceTRADE_POT
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1298 Part IV ■ ReferenceUNIT_PET_
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1300 Part IV ■ ReferenceUPDATE_MA
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PartVAppendixesIn This PartAppendix
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1306 Part V ■ AppendixesUse Meani
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1308 Part V ■ Appendixeshard codi
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1310 Part V ■ AppendixesOrganizat
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1312 Part V ■ Appendixesespeciall
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1314 Part V ■ Appendixesitself to
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1316 Part V ■ AppendixesTAIL CALL
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1318 Part V ■ AppendixesEach time
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1320 Part V ■ AppendixesEven if y
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1322 Part V ■ AppendixesEach even
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1324 Part V ■ Appendixesthe basic
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1326 Part V ■ AppendixesEntering
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APPENDIXBUtilizing Addon LibrariesW
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Appendix B ■ Utilizing Addon Libr
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1340 Part V ■ AppendixesOne major
Page 1384 and 1385:
1342 Part V ■ Appendixessvn updat
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1344 Part V ■ AppendixesGit and M
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1346 Part V ■ AppendixesOnce that
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1348 Part V ■ Appendixesremote: a
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1350 Part V ■ Appendixeshave alre
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1352 Part V ■ Appendixesthe other
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1354 Part V ■ Appendixesand open
Page 1399 and 1400:
IndexAAbandonQuest, 556AbandonSkill
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Index ■ A-B 1359hyperlink, 549-55
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Index ■ B-C 1361BuyPetition, 564B
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Index ■ C-C 1363Lua library funct
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Index ■ C-C 1365storing damage an
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Index ■ D-E 1367dropdown frames,
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Index ■ F-F 1369TabButtonTemplate
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Index ■ G-G 1371GetAchievementNum
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Index ■ G-G 1373GetGameTime, 699G
Page 1417 and 1418:
Index ■ G-G 1375GetNumLetters(),
Page 1419 and 1420:
Index ■ G-G 1377GetStatusBarColor
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Index ■ G-I 1379GuildInvite, 832G
Page 1423 and 1424:
Index ■ I-K 1381IsPlaying(), Anim
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Index ■ L-M 1383Lua interpreterdo
Page 1427 and 1428:
Index ■ O-O 1385OnClick widget sc
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Index ■ P-R 1387PlaySoundFile, 89
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Index ■ S-S 1389how addon code ca
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Index ■ S-S 1391SetInventoryItem(
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Index ■ S-S 1393overview of, 337S
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Index ■ T-T 1395table.insert, 58-
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Index ■ U-U 1397UnitArmor, 962Uni
Page 1441 and 1442:
Index ■ W-W 1399WWebLua, 15well-f
Page 1443:
Your secret weapon againstthe Lich
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Wiley-World.of.Warcraft.Programming.A.Guide.and.Reference.for.Creating.WoW.Addons

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