Property Let Statement

Artículo
07/17/2015

Declares, in a Class block, the name, arguments, and code that form the body of a Property procedure that assigns (sets) the value of a property.

Syntax

[Public | Private] Property Let name ([arglist,] value)
   [statements]
   [Exit Property] 
   [statements]
End Property

Arguments

Public
Indicates that the Property Let procedure is accessible to all other procedures in all scripts.
Private
Indicates that the Property Let procedure is accessible only to other procedures in the Class block where it's declared.
name
Name of the Property Let procedure; follows standard variable naming conventions, except that the name can be the same as a Property Get or Property Set procedure in the same Class block.
arglist
List of variables representing arguments that are passed to the Property Let procedure when it is called. Commas separate multiple arguments. The name of each argument in a Property Let procedure must be the same as the corresponding argument in a Property Get procedure. In addition, the Property Let procedure will always have one more argument than its corresponding Property Get procedure. That argument is the value being assigned to the property.
value
Variable to contain the value to be assigned to the property. When the procedure is called, this argument appears on the right side of the calling expression.
statements
Any group of statements to be executed within the body of the Property Let procedure.

Remarks

If not explicitly specified using either Public or Private, Property Let procedures are public by default, that is, they are visible to all other procedures in your script. The value of local variables in a Property Let procedure is not preserved between calls to the procedure.

You can't define a Property Let procedure inside any other procedure (e.g. Function or Property Get).

The Exit Property statement causes an immediate exit from a Property Let procedure. Program execution continues with the statement that follows the statement that called the Property Let procedure. Any number of Exit Property statements can appear anywhere in a Property Let procedure.

Note

Every Property Let statement must define at least one argument for the procedure it defines. That argument (or the last argument if there is more than one) contains the actual value to be assigned to the property when the procedure defined by the Property Let statement is invoked. That argument is referred to as value in the preceding syntax.

Like a Function and Property Get procedure, a Property Let procedure is a separate procedure that can take arguments, perform a series of statements, and change the value of its arguments. However, unlike a Function and Property Get procedure, both of which return a value, you can only use a Property Let procedure on the left side of a property assignment expression.

The following example illustrates the use of the Property Let statement.

Class Customer
    Private m_CustomerName
    Private m_Address(2)

    Private Sub Class_Initialize
        m_CustomerName = ""
        m_Address(0) = ""
        m_Address(1) = ""
    End Sub

    ' CustomerName property.
    Public Property Get CustomerName
        CustomerName = m_CustomerName
    End Property

    Public Property Let CustomerName(custname)
        m_CustomerName = custname
    End Property

    ' Address property.
    Public Property Get Address(index)
        Address = m_Address(index)
    End Property

    Public Property Let Address(index, addr)
        m_Address(index) = addr
    End Property
End Class

Dim cust
Set cust = New Customer

' Set the object's properties.
cust.CustomerName = "Fabrikam, Inc."
cust.Address(0) = "4567 Main Street"
cust.Address(1) = "Suite 100"

' Get the object's properties.
Dim s
s = s & cust.CustomerName & vbCrLf
s = s & cust.Address(0) & vbCrLf
s = s & cust.Address(1) & vbCrLf

MsgBox (s)

Requirements

Version 5

Change History

Date	History	Reason
April 2009	Added example.	Customer feedback.

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