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The
If HyperCard can't find either the document or the application, it displays a directory dialog box and asks the user to find it. HyperCard also sets If HyperCard has problems opening the application (for example, there’s not enough memory), it sets After printing, the application program quits, and control returns to HyperCard. Finally, Expressions are printed using the settings in Examples
Demo Script
PlaceholdersposIntegerAn expression that evaluates to a positive integer. For example:
See also: background, bkgnd, button, card, chunk, field, menu , and menuItem card An expression that identifies a card by name, number, or id using one of the following forms (in AppleScript, use “background” in place of “bkgnd”):
card id posInteger [of bkgnd ]card text [of bkgnd ] -- namecard posInteger [of bkgnd ] -- numberordinal card [of bkgnd ]position card [of bkgnd ]ordinal marked cardposition marked cardmarked card posIntegerFor example:
When used inside a card script in HyperTalk:
When a card receives a message: See also: button and field field An expression that identifies a field by name, number, or id using one of the following forms (in AppleScript, use “background” in place of “bkgnd”): card field id posInteger [of card ]card field text [of card ] -- namecard field posInteger [of card ]ordinal card field [of card ] [bkgnd ] field id posInteger [of card ] [bkgnd ] field text [of card ] -- name [bkgnd ] field posInteger [of card ]ordinal [bkgnd ] field [of card ]For example:
When used inside a field script in HyperTalk:
When a field receives a message:[the] target A field can also be referred to as a part when you’re talking about its position among all buttons and fields within the same card or background. button HyperTalk DefinitionAn expression that identifies a button by name, number, or id, using one of the following forms: [ card ] button id posInteger [of card ] [card ] button text [of card ] -- name [card ] button posInteger [of card ]ordinal [card ] button [of card ] button id posInteger [of card ]bkgnd button text [of card ] -- namebkgnd button posInteger [of card ]ordinal bkgnd button [of card ] For example:
When used inside a button script:
When a button receives a message: A button can also be referred to as a part when you’re talking about its position among all buttons and fields within the same card or background.AppleScript DefinitionAn expression that identifies a button by name, number, or id, using the same forms as HyperTalk except that “background” must be used in place of “bkgnd”. fileName An expression that evaluates to a text string that is also a valid Macintosh filename. For example: application An expression that evaluates to a text string and that is also the name of a Macintosh application. expression HyperTalk DefinitionAny HyperTalk expression. All expressions evaluate to text, a number, or a constant. For example:
Note: Formally, HyperCard distinguishes between factors (simple values) and expressions. The difference between factors and expressions matters only if you like to drop parentheses. Most functions take factors as their parameters, which is why length of 3 + 5 returns 6 and length of (3 + 5) returns 1 . In short, always use parentheses to group things the way you want them to evaluate, and you won’t have to worry about the difference between factors and expressions.AppleScript DefinitionAny series of words that has a value. Related Topics
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Version 0.7b1 (March 24, 2022)