You’re currently in the HyperTalk Reference stack. This stack describes HyperTalk, HyperCard’s script language. By writing your own scripts, you have much more control over HyperCard than is available using just the menu commands. You can make a stack do what you want it to do. * [HyperTalk basics](#hypertalkbasics) * [Editing scripts](#editingscripts) * [System messages](#systemmessages) * [Keywords](#keywords) * [Commands](#commands) * [Functions](#functions) * [Properties](#properties) * [Operators and constants](#operatorsandconstants) --- ## HyperTalk basics * [Set the user level to scripting](/HyperTalkReference/Set-the-user-level-to-scripting) * [HyperTalk and scripts](/HyperTalkReference/HyperTalk-and-scripts) * [What are messages?](/HyperTalkReference/What-are-messages) * [Handling messages](/HyperTalkReference/Handling-messages) * [The message-passing order](/HyperTalkReference/The-message-passing-order) * [Writing message handlers](/HyperTalkReference/Writing-message-handlers) * [Using parameter variables](/HyperTalkReference/Using-parameter-variables) * [Writing function handlers](/HyperTalkReference/Writing-function-handlers) * [The building blocks](/HyperTalkReference/The-building-blocks) * [Referring to objects](/HyperTalkReference/Referring-to-objects) ## Editing scripts * [Add comments to a script](/HyperTalkReference/Add-comments-to-a-script) * [Close a script window](/HyperTalkReference/Close-a-script-window) * [Debug a script](/HyperTalkReference/Debug-a-script) * [Move between open scripts](/HyperTalkReference/Move-between-open-scripts) * [Open a script window](/HyperTalkReference/Open-a-script-window) * [Save a script](/HyperTalkReference/Save-a-script) * [Set the font and size of a script](/HyperTalkReference/Set-the-font-and-size-of-a-script) ## System messages * [Commands sent automatically](/HyperTalkReference/Commands-sent-automatically) * [Message sending orders](/HyperTalkReference/Message-sending-orders) * [Where messages are sent initially](/HyperTalkReference/Where-messages-are-sent-initially) * [appleEvent](/HyperTalkReference/appleEvent) * [closeBackground](/HyperTalkReference/closeBackground) * [closeCard](/HyperTalkReference/closeCard) * [closeField](/HyperTalkReference/closeField) * [closeStack](/HyperTalkReference/closeStack) * [deleteBackground](/HyperTalkReference/deleteBackground) * [deleteButton](/HyperTalkReference/deleteButton) * [deleteCard](/HyperTalkReference/deleteCard) * [deleteField](/HyperTalkReference/deleteField) * [deleteStack](/HyperTalkReference/deleteStack) * [errorDialog](/HyperTalkReference/errorDialog) * [exitField](/HyperTalkReference/exitField) * [idle](/HyperTalkReference/idle) * [mouseDoubleClick](/HyperTalkReference/mouseDoubleClick) * [mouseDown](/HyperTalkReference/mouseDown) * [mouseEnter](/HyperTalkReference/mouseEnter) * [mouseLeave](/HyperTalkReference/mouseLeave) * [mouseStillDown](/HyperTalkReference/mouseStillDown) * [mouseUp](/HyperTalkReference/mouseUp) * [mouseWithin](/HyperTalkReference/mouseWithin) * [moveWindow](/HyperTalkReference/moveWindow) * [newBackground](/HyperTalkReference/newBackground) * [newButton](/HyperTalkReference/newButton) * [newCard](/HyperTalkReference/newCard) * [newField](/HyperTalkReference/newField) * [newStack](/HyperTalkReference/newStack) * [openBackground](/HyperTalkReference/openBackground) * [openCard](/HyperTalkReference/openCard) * [openField](/HyperTalkReference/openField) * [openStack](/HyperTalkReference/openStack) * [quit](/HyperTalkReference/quit) * [resume](/HyperTalkReference/resume) * [resumeStack](/HyperTalkReference/resumeStack) * [sizeWindow](/HyperTalkReference/sizeWindow) * [startUp](/HyperTalkReference/startUp) * [suspend](/HyperTalkReference/suspend) * [suspendStack](/HyperTalkReference/suspendStack) ## Keywords * [do](/HyperTalkReference/do) * [exit](/HyperTalkReference/exit) * [function](/HyperTalkReference/function) * [global](/HyperTalkReference/global) * [if (multiple-statement)](/HyperTalkReference/if-multiple-statement) * [if (single-statement)](/HyperTalkReference/if-single-statement) * [on](/HyperTalkReference/on) * [pass](/HyperTalkReference/pass) * [repeat](/HyperTalkReference/repeat) * [repeat for](/HyperTalkReference/repeat-for) * [repeat until](/HyperTalkReference/repeat-until) * [repeat while](/HyperTalkReference/repeat-while) * [repeat with](/HyperTalkReference/repeat-with) * [return](/HyperTalkReference/return) * [send](/HyperTalkReference/send) ## Commands * [add](/HyperTalkReference/add) * [answer](/HyperTalkReference/answer) * [arrowKey](/HyperTalkReference/arrowKey) * [ask](/HyperTalkReference/ask) * [beep](/HyperTalkReference/beep) * [choose](/HyperTalkReference/choose) * [click at](/HyperTalkReference/click-at) * [close](/HyperTalkReference/close) * [commandKeyDown](/HyperTalkReference/commandKeyDown) * [controlKey](/HyperTalkReference/controlKey) * [convert](/HyperTalkReference/convert) * [copy template](/HyperTalkReference/copy-template) * [create](/HyperTalkReference/create) * [debug](/HyperTalkReference/debug) * [delete](/HyperTalkReference/delete) * [dial](/HyperTalkReference/dial) * [disable](/HyperTalkReference/disable) * [divide](/HyperTalkReference/divide) * [doMenu](/HyperTalkReference/doMenu) * [drag](/HyperTalkReference/drag) * [edit script](/HyperTalkReference/edit-script) * [enable](/HyperTalkReference/enable) * [enterInField](/HyperTalkReference/enterInField) * [enterKey](/HyperTalkReference/enterKey) * [export paint](/HyperTalkReference/export-paint) * [find](/HyperTalkReference/find) * [functionKey](/HyperTalkReference/functionKey) * [get](/HyperTalkReference/get) * [go](/HyperTalkReference/go) * [help](/HyperTalkReference/help) * [hide](/HyperTalkReference/hide) * [import paint](/HyperTalkReference/import-paint) * [keyDown](/HyperTalkReference/keyDown) * [lock](/HyperTalkReference/lock) * [mark](/HyperTalkReference/mark) * [multiply](/HyperTalkReference/multiply) * [open](/HyperTalkReference/open) * [open file](/HyperTalkReference/open-file) * [open printing](/HyperTalkReference/open-printing) * [open report printing](/HyperTalkReference/open-report-printing) * [play](/HyperTalkReference/play) * [pop](/HyperTalkReference/pop) * [print](/HyperTalkReference/print) * [push](/HyperTalkReference/push) * [put](/HyperTalkReference/put) * [read](/HyperTalkReference/read) * [reply](/HyperTalkReference/reply) * [request](/HyperTalkReference/request) * [reset](/HyperTalkReference/reset) * [returnInField](/HyperTalkReference/returnInField) * [returnKey](/HyperTalkReference/returnKey) * [run](/HyperTalkReference/run) * [save](/HyperTalkReference/save) * [select](/HyperTalkReference/select) * [set](/HyperTalkReference/set) * [show](/HyperTalkReference/show) * [sort](/HyperTalkReference/sort) * [start using](/HyperTalkReference/start-using) * [stop using](/HyperTalkReference/stop-using) * [subtract](/HyperTalkReference/subtract) * [tabKey](/HyperTalkReference/tabKey) * [type](/HyperTalkReference/type) * [unlock](/HyperTalkReference/unlock) * [unmark](/HyperTalkReference/unmark) * [visual](/HyperTalkReference/visual) * [wait](/HyperTalkReference/wait) * [write](/HyperTalkReference/write) ## Functions * [abs](/HyperTalkReference/abs) * [annuity](/HyperTalkReference/annuity) * [atan](/HyperTalkReference/atan) * [average](/HyperTalkReference/average) * [charToNum](/HyperTalkReference/charToNum) * [clickChunk](/HyperTalkReference/clickChunk) * [clickH and clickV](/HyperTalkReference/clickH-and-clickV) * [clickLine](/HyperTalkReference/clickLine) * [clickLoc](/HyperTalkReference/clickLoc) * [clickText](/HyperTalkReference/clickText) * [commandKey](/HyperTalkReference/commandKey) * [compound](/HyperTalkReference/compound) * [cos](/HyperTalkReference/cos) * [date](/HyperTalkReference/date) * [destination](/HyperTalkReference/destination) * [diskSpace](/HyperTalkReference/diskSpace) * [exp, exp1, exp2](/HyperTalkReference/exp-exp1-exp2) * [foundChunk](/HyperTalkReference/foundChunk) * [foundField](/HyperTalkReference/foundField) * [foundLine](/HyperTalkReference/foundLine) * [foundText](/HyperTalkReference/foundText) * [heapSpace](/HyperTalkReference/heapSpace) * [length](/HyperTalkReference/length) * [ln, ln1, log2](/HyperTalkReference/ln-ln1-log2) * [max](/HyperTalkReference/max) * [menus](/HyperTalkReference/menus) * [min](/HyperTalkReference/min) * [mouse](/HyperTalkReference/mouse) * [mouseClick](/HyperTalkReference/mouseClick) * [mouseH and mouseV](/HyperTalkReference/mouseH-and-mouseV) * [mouseLoc](/HyperTalkReference/mouseLoc) * [number](/HyperTalkReference/number) * [numToChar](/HyperTalkReference/numToChar) * [offset](/HyperTalkReference/offset) * [optionKey](/HyperTalkReference/optionKey) * [param](/HyperTalkReference/param) * [paramCount](/HyperTalkReference/paramCount) * [params](/HyperTalkReference/params) * [programs](/HyperTalkReference/programs) * [random](/HyperTalkReference/random) * [result](/HyperTalkReference/result) * [round](/HyperTalkReference/round) * [screenRect](/HyperTalkReference/screenRect) * [seconds](/HyperTalkReference/seconds) * [selectedButton](/HyperTalkReference/selectedButton) * [selectedChunk](/HyperTalkReference/selectedChunk) * [selectedField](/HyperTalkReference/selectedField) * [selectedLine](/HyperTalkReference/selectedLine) * [selectedLoc](/HyperTalkReference/selectedLoc) * [selectedText](/HyperTalkReference/selectedText) * [shiftKey](/HyperTalkReference/shiftKey) * [sin](/HyperTalkReference/sin) * [sound](/HyperTalkReference/sound) * [sqrt](/HyperTalkReference/sqrt) * [stacks](/HyperTalkReference/stacks) * [stackSpace](/HyperTalkReference/stackSpace) * [sum](/HyperTalkReference/sum) * [systemVersion](/HyperTalkReference/systemVersion) * [tan](/HyperTalkReference/tan) * [target](/HyperTalkReference/target) * [ticks](/HyperTalkReference/ticks) * [time](/HyperTalkReference/time) * [tool](/HyperTalkReference/tool) * [trunc](/HyperTalkReference/trunc) * [value](/HyperTalkReference/value) * [windows](/HyperTalkReference/windows) ## Properties * [address](/HyperTalkReference/address) * [autoHilite](/HyperTalkReference/autoHilite) * [autoSelect](/HyperTalkReference/autoSelect) * [autoTab](/HyperTalkReference/autoTab) * [blindTyping](/HyperTalkReference/blindTyping) * [bottom](/HyperTalkReference/bottom) * [bottomRight](/HyperTalkReference/bottomRight) * [brush](/HyperTalkReference/brush) * [cantAbort](/HyperTalkReference/cantAbort) * [cantDelete](/HyperTalkReference/cantDelete) * [cantModify](/HyperTalkReference/cantModify) * [cantPeek](/HyperTalkReference/cantPeek) * [centered](/HyperTalkReference/centered) * [checkMark](/HyperTalkReference/checkMark) * [commandChar](/HyperTalkReference/commandChar) * [cursor](/HyperTalkReference/cursor) * [debugger](/HyperTalkReference/debugger) * [dialingTime](/HyperTalkReference/dialingTime) * [dialingVolume](/HyperTalkReference/dialingVolume) * [dontSearch](/HyperTalkReference/dontSearch) * [dontWrap](/HyperTalkReference/dontWrap) * [dragSpeed](/HyperTalkReference/dragSpeed) * [editBkgnd](/HyperTalkReference/editBkgnd) * [enabled](/HyperTalkReference/enabled) * [environment](/HyperTalkReference/environment) * [family](/HyperTalkReference/family) * [filled](/HyperTalkReference/filled) * [fixedLineHeight](/HyperTalkReference/fixedLineHeight) * [freeSize](/HyperTalkReference/freeSize) * [grid](/HyperTalkReference/grid) * [height](/HyperTalkReference/height) * [hilite](/HyperTalkReference/hilite) * [icon](/HyperTalkReference/icon) * [ID ](/HyperTalkReference/ID) * [itemDelimiter](/HyperTalkReference/itemDelimiter) * [language](/HyperTalkReference/language) * [left](/HyperTalkReference/left) * [lineSize](/HyperTalkReference/lineSize) * [location](/HyperTalkReference/location) * [lockErrorDialogs](/HyperTalkReference/lockErrorDialogs) * [lockMessages](/HyperTalkReference/lockMessages) * [lockRecent](/HyperTalkReference/lockRecent) * [lockScreen](/HyperTalkReference/lockScreen) * [lockText](/HyperTalkReference/lockText) * [longWindowTitles](/HyperTalkReference/longWindowTitles) * [markChar](/HyperTalkReference/markChar) * [marked](/HyperTalkReference/marked) * [menuMessage](/HyperTalkReference/menuMessage) * [messageWatcher](/HyperTalkReference/messageWatcher) * [multiple](/HyperTalkReference/multiple) * [multipleLines](/HyperTalkReference/multipleLines) * [multiSpace](/HyperTalkReference/multiSpace) * [name](/HyperTalkReference/name) * [number (property)](/HyperTalkReference/number-property) * [numberFormat](/HyperTalkReference/numberFormat) * [owner](/HyperTalkReference/owner) * [partNumber](/HyperTalkReference/partNumber) * [pattern](/HyperTalkReference/pattern) * [polySides](/HyperTalkReference/polySides) * [powerKeys](/HyperTalkReference/powerKeys) * [printMargins](/HyperTalkReference/printMargins) * [printTextAlign](/HyperTalkReference/printTextAlign) * [printTextFont](/HyperTalkReference/printTextFont) * [printTextHeight](/HyperTalkReference/printTextHeight) * [printTextSize](/HyperTalkReference/printTextSize) * [printTextStyle](/HyperTalkReference/printTextStyle) * [rectangle](/HyperTalkReference/rectangle) * [reportTemplates](/HyperTalkReference/reportTemplates) * [right](/HyperTalkReference/right) * [script](/HyperTalkReference/script) * [scriptEditor](/HyperTalkReference/scriptEditor) * [scriptingLanguage](/HyperTalkReference/scriptingLanguage) * [scriptTextFont](/HyperTalkReference/scriptTextFont) * [scriptTextSize](/HyperTalkReference/scriptTextSize) * [scroll](/HyperTalkReference/scroll) * [sharedHilite](/HyperTalkReference/sharedHilite) * [sharedText](/HyperTalkReference/sharedText) * [showLines](/HyperTalkReference/showLines) * [showName](/HyperTalkReference/showName) * [showPict](/HyperTalkReference/showPict) * [size](/HyperTalkReference/size) * [stacksInUse](/HyperTalkReference/stacksInUse) * [style](/HyperTalkReference/style) * [suspended](/HyperTalkReference/suspended) * [textAlign](/HyperTalkReference/textAlign) * [textArrows](/HyperTalkReference/textArrows) * [textFont](/HyperTalkReference/textFont) * [textHeight](/HyperTalkReference/textHeight) * [textSize](/HyperTalkReference/textSize) * [textStyle](/HyperTalkReference/textStyle) * [titleWidth](/HyperTalkReference/titleWidth) * [top](/HyperTalkReference/top) * [topLeft](/HyperTalkReference/topLeft) * [traceDelay](/HyperTalkReference/traceDelay) * [userLevel](/HyperTalkReference/userLevel) * [userModify](/HyperTalkReference/userModify) * [variableWatcher](/HyperTalkReference/variableWatcher) * [version](/HyperTalkReference/version) * [visible](/HyperTalkReference/visible) * [wideMargins](/HyperTalkReference/wideMargins) * [width](/HyperTalkReference/width) * [zoomed](/HyperTalkReference/zoomed) ## Operators and constants * [Arithmetic operators](/HyperTalkReference/Arithmetic-operators) * [Comparison operators](/HyperTalkReference/Comparison-operators) * [Logical operators](/HyperTalkReference/Logical-operators) * [String operators](/HyperTalkReference/String-operators) * [Type and existence operators](/HyperTalkReference/Type-and-existence-operators) * [Constants](/HyperTalkReference/Constants)