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VBScript in a Nutshell by Ron Petrusha, Paul Lomax, Matt Childs

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Name

Property Set Statement

Syntax

[Public | Private Property Set name ([arglist,] reference)
   [statements]
   [Exit Property] 
   [statements]
End Property
Public

Use: Optional

Type: Keyword

Makes the property accessible from outside the class, so that it is visible to all procedures in all scripts. Public and Private are mutually exclusive.

Private

Use: Optional

Type: Keyword

Restricts the scope of the property to code within the Class...End Class construct in which the property is declared. Public and Private are mutually exclusive.

name

Use: Required

The name of the property.

arglist

Use: Optional

Data Subtype: Any

A comma-delimited list of variables to be passed to the property as arguments from the calling procedure.

reference

Use: Required

Data Subtype: Object

The last (or only) argument in arglist, it must be a variable containing the object reference to be assigned to the property.

statements

Use: Optional

Program code to be executed within the property.

arglist uses the following syntax and parts:
[ByVal | ByRef] varname[( )] _
     ByVal

Use: Optional

Type: Keyword

The argument is passed by value; that is, a local copy of the variable is assigned the value of the argument.

ByRef

Use: Optional

Type: Keyword

The argument is passed by reference; that is, the local variable is simply a reference to the argument being passed. All changes made to the local variable are reflected in the calling argument when control returns to the calling procedure. ByRef is the default method of passing variables.

varname ...

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