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<FONT SIZE=1 COLOR=#660033>Microsoft® Visual Basic® Scripting Edition</FONT><br>
<FONT SIZE=5 COLOR=#660033><B>VBScript Glossary</B></FONT>
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<FONT SIZE=2> <A HREF="vbstoc.htm">Language Reference</A> <BR>
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<DL><HR NOSHADE SIZE=1>
<A NAME="defActiveXControl"> </A>
<DT><B>ActiveX control</B></DT>
<DD>An object that you place on a form to enable or enhance a user's interaction with an application. ActiveX controls have events and can be incorporated into other controls. The controls have an .ocx file name extension.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defActiveXObject"> </A>
<DT><B>ActiveX object</B></DT>
<DD>An object that is exposed to other applications or programming tools through Automation interfaces.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defArg"> </A>
<DT><B>argument</B></DT>
<DD>A constant, variable, or expression passed to a procedure.</DD><P>
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<A NAME="defArray"> </A>
<DT><B>array</B></DT>
<DD>A set of sequentially indexed elements having the same type of data. Each element of an array has a unique identifying index number. Changes made to one element of an array do not affect the other elements.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defASCII"> </A>
<DT><B>ASCII Character Set</B></DT>
<DD>American Standard Code for Information Interchange (ASCII) 7-bit character set widely used to represent letters and symbols found on a standard U.S. keyboard. The ASCII character set is the same as the first 128 characters (0–127) in the ANSI character set.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defOLEAutomationObject"> </A>
<DT><B>Automation object</B></DT>
<DD>An object that is exposed to other applications or programming tools through Automation interfaces.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defBitwise"> </A>
<DT><B>bitwise comparison</B></DT>
<DD>A bit-by-bit comparison of identically positioned bits in two numeric expressions.</DD><P>
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<A NAME="defBoolean"> </A>
<DT><B>Boolean expression</B></DT>
<DD>An expression that evaluates to either <b>True</b> or <b>False</b>.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defByReference"> </A>
<DT><B>by reference</B></DT>
<DD>A way of passing the address, rather than the value, of an argument to a procedure. This allows the procedure to access the actual variable. As a result, the variable's actual value can be changed by the procedure to which it is passed.</DD><P>
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<A NAME="defByValue"> </A>
<DT><B>by value</B></DT>
<DD>A way of passing the value, rather than the address, of an argument to a procedure. This allows the procedure to access a copy of the variable. As a result, the variable's actual value can't be changed by the procedure to which it is passed.</DD><P>
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<A NAME="defCharCode"> </A>
<DT><B>character code</B></DT>
<DD>A number that represents a particular character in a set, such as the ASCII character set.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defClass"> </A>
<DT><B>class</B></DT>
<DD>The formal definition of an object. The class acts as the template from which an instance of an object is created at run time. The class defines the properties of the object and the methods used to control the object's behavior.</DD><P>
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<A NAME="defClassModule"> </A>
<DT><B>class module</B></DT>
<DD>A module containing the definition of a class (its property and method definitions).</DD><P>
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<A NAME="defCollection"> </A>
<DT><B>collection</B></DT>
<DD>An object that contains a set of related objects. An object's position in the collection can change whenever a change occurs in the collection; therefore, the position of any specific object in the collection may vary.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defComment"> </A>
<DT><B>comment</B></DT>
<DD>Text added to code by a programmer that explains how the code works. In Visual Basic Scripting Edition, a comment line generally starts with an apostrophe (<b>'</b>), or you can use the keyword <b>Rem</b> followed by a space.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defComparisonOperator"> </A>
<DT><B>comparison operator</B></DT>
<DD>A character or symbol indicating a relationship between two or more values or expressions. These operators include less than (<), less than or equal to (<=), greater than (>), greater than or equal to (>=), not equal (<>), and equal (=). <p><b>Is</b> is also a comparison operator, but it is used exclusively for determining if one object reference is the same as another.</DD><P>
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<A NAME="defConstant"> </A>
<DT><B>constant</B></DT>
<DD>A named item that retains a constant value throughout the execution of a program. Constants can be used anywhere in your code in place of actual values. A constant can be a string or numeric literal, another constant, or any combination that includes arithmetic or logical operators except <b>Is</b> and exponentiation. For example:<P>
<BLOCKQUOTE><PRE><FONT FACE="Courier New" SIZE=3>
Const A = "MyString"
</FONT></PRE></BLOCKQUOTE></DD><P>
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<A NAME="defDataTypeRanges"> </A>
<DT><B>data ranges</B></DT>
<DD>Each Variant subtype has a specific range of allowed values:<P>
<TABLE WIDTH=87% BORDER=1 CELLPADDING=5 CELLSPACING=0>
<TR VALIGN=TOP BGCOLOR="#DDDDDD">
<TD><FONT SIZE=2><b>Subtype</b></FONT></TD>
<TD><FONT SIZE=2><b>Range</b></FONT></TD></TR>
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<TD><FONT SIZE=2><b>Byte</b></FONT></TD>
<TD><FONT SIZE=2>0 to 255.</FONT></TD></TR>
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<TD><FONT SIZE=2><b>Boolean</b></FONT></TD>
<TD><FONT SIZE=2><b>True</b> or <b>False</b>.</FONT></TD></TR>
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<TD><FONT SIZE=2><b>Integer</b></FONT></TD>
<TD><FONT SIZE=2>-32,768 to 32,767.</FONT></TD></TR>
<TR VALIGN=TOP>
<TD><FONT SIZE=2><b>Long</b></FONT></TD>
<TD><FONT SIZE=2>-2,147,483,648 to 2,147,483,647.</FONT></TD></TR>
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<TD><FONT SIZE=2><b>Single</b></FONT></TD>
<TD><FONT SIZE=2>-3.402823E38 to -1.401298E-45 for negative values; 1.401298E-45 to 3.402823E38 for positive values.</FONT></TD></TR>
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<TD><FONT SIZE=2><b>Double</b></FONT></TD>
<TD><FONT SIZE=2>-1.79769313486232E308 to -4.94065645841247E-324 for negative values; 4.94065645841247E-324 to 1.79769313486232E308 for positive values.</FONT></TD></TR>
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<TD><FONT SIZE=2><b>Currency</b></FONT></TD>
<TD><FONT SIZE=2>-922,337,203,685,477.5808 to 922,337,203,685,477.5807.</FONT></TD></TR>
<TR VALIGN=TOP>
<TD><FONT SIZE=2><b>Date</b></FONT></TD>
<TD><FONT SIZE=2>January 1, 100 to December 31, 9999, inclusive.</FONT></TD></TR>
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<TD><FONT SIZE=2><b>Object</b></FONT></TD>
<TD><FONT SIZE=2>Any <b>Object</b> reference.</FONT></TD></TR>
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<TD><FONT SIZE=2><b>String</b></FONT></TD>
<TD><FONT SIZE=2>Variable-length strings may range in length from 0 to approximately 2 billion characters.</FONT></TD></TR></TABLE></DD><P><P>
<HR NOSHADE SIZE=1>
<A NAME="defDateExpression"> </A>
<DT><B>date expression</B></DT>
<DD>Any expression that can be interpreted as a date. This includes any combination of date literals, numbers that look like dates, strings that look like dates, and dates returned from functions. A date expression is limited to numbers or strings, in any combination, that can represent a date from January 1, 100 through December 31, 9999.
<P>Dates are stored as part of a real number. Values to the left of the decimal represent the date; values to the right of the decimal represent the time. Negative numbers represent dates prior to December 30, 1899.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defDateLiteral"> </A>
<DT><B>date literal</B></DT>
<DD>Any sequence of characters with a valid format that is surrounded by number signs (#). Valid formats include the date format specified by the locale settings for your code or the universal date format. For example, #12/31/99# is the date literal that represents December 31, 1999, where English-U.S. is the locale setting for your application.
<P>In VBScript, the only recognized format is US-ENGLISH, regardless of the actual locale of the user. That is, the interpreted format is mm/dd/yyyy.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defDateSeparators"> </A>
<DT><B>date separators</B></DT>
<DD>Characters used to separate the day, month, and year when date values are formatted.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defEmpty"> </A>
<DT><B>Empty</B></DT>
<DD>A value that indicates that no beginning value has been assigned to a variable. <b>Empty</b> variables are 0 in a numeric context, or zero-length in a string context.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defErrorNumber"> </A>
<DT><B>error number</B></DT>
<DD>A whole number in the range 0 to 65,535, inclusive, that corresponds to the <b>Number</b> property of the <b>Err</b> object. When combined with the <b>Name</b> property of the <b>Err</b> object, this number represents a particular error message. </DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defExpression"> </A>
<DT><B>expression</B></DT>
<DD>A combination of keywords, operators, variables, and constants that yield a string, number, or object. An expression can perform a calculation, manipulate characters, or test data.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defIntrinsicConstant"> </A>
<DT><B>intrinsic constant</B></DT>
<DD>A constant provided by an application. Because you can't disable intrinsic constants, you can't create a user-defined constant with the same name.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defkeyword"> </A>
<DT><B>keyword</B></DT>
<DD>A word or symbol recognized as part of the VBScript language; for example, a statement, function name, or operator.</DD><P>
<HR NOSHADE SIZE=1>
<A NAME="defLocale"> </A>
<DT><B>locale</B></DT>
<DD>The set of information that corresponds to a given language and country. A locale affects the language of predefined programming terms and locale-specific settings. There are two contexts where locale information is important:
<UL>
<LI>The code locale affects the language of terms such as keywords and defines locale-specific settings such as the decimal and list separators, date formats, and character sorting order.
<LI>The system locale affects the way locale-aware functionality behaves, for example, when you display numbers or convert strings to dates. You set the system locale using the Control Panel utilities provided by the operating system.
</UL></DD><P>
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