VBScript Reference Manual for InduSoft Web Studio

VBScript Reference Manual InduSoft Web Studio
VBScript Objects and Collections
Objects and collections
Class Object Matches Collection
Debug Object RegExp Object
Err Object SubMatches Collection
Match Object
These Objects and Collections are “built-in” to VBScript and do not rely on any runtime libraries or
ActiveX components.
Class
Description Declares the name of a class, as well as a definition of the variables, properties, and methods
that comprise the class
Usage Class classname
statements
End Class
Arguments classname
Required. Name of the Class; follows standard variable naming conventions.
statements
Required. One or more statements that define the variables, properties, and methods of the
Class.
Remarks Within a Class block, members are declared as either Private or Public using the appropriate
declaration statements. Anything declared as Private is visible only within the Class block.
Anything declared as Public is visible within the Class block, as well as by code outside the
Class block. Anything not explicitly declared as either Private or Public is Public by default.
Procedures (either Sub or Function) declared Public within the class block become methods of
the class. Public variables serve as properties of the class, as do properties explicitly declared
using Property Get, Property Let, and Property Set. Default properties and methods for the
class are specified in their declarations using the Default keyword. See the individual declaration
statement topics for information on how this keyword is used. You must instantiate an object to
use it, using the Set command; i.e. Set objname = New classname.
The Class block also supports two special subroutines; Class_Initialize() and
Class_Terminate(). Code in the Class_Initialize() subroutine executes one time when the Class
is instantiated by the statement Set objName = New classname. Code in the Class_Terminate()
subroutine executes once when the Class is terminated by the Set objName = Nothing statement
or when the Class goes out of scope. The Class_Initialize() and Class_Terminate() subroutines
can be Private or Public, but it is recommended to make these Private so that these subroutines
may not be called by another code segment.
See Also Property Get, Property Let, Property Set
Example Class SignOn
Private MyName, MyLevel ‘Variable declaration
Private Sub Class_Initialize()
‘Rem Code here executes when Set objName = Class classname statement is executed
End Sub
Private Sub Class_Terminate()
‘Rem Code here executes when Set objName = Nothing statement is executed or
‘code goes out of scope.
End Sub
Public Property Let UsrName(strName) ‘Set the property value for user name
MyName = strName
196 InduSoft, Ltd.