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Daminc
 
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Default SET statement tutorial


Can anyone point me in the direction of a decent tutorial on the proper
way of using the SET statement please?

This:

Assigns an object reference to a variable or property.

Syntax

Set objectvar = {[New] objectexpression | Nothing}

The Set statement syntax has these parts:

Part Description
objectvar Required. Name of the variable or property; follows standard
variable naming conventions.
New Optional. New is usually used during declaration to enable implicit
object creation. When New is used with Set, it creates a new instance of
the class. If objectvar contained a reference to an object, that
reference is released when the new one is assigned. The New keyword
can't be used to create new instances of any intrinsic data type and
can't be used to create dependent objects.
objectexpression Required. Expression consisting of the name of an
object, another declared variable of the same object type, or a
function or method that returns an object of the same object type.
Nothing Optional. Discontinues association of objectvar with any
specific object. Assigning Nothing to objectvar releases all the system
and memory resources associated with the previously referenced object
when no other variable refers to it.



Remarks

To be valid, objectvar must be an object type consistent with the
object being assigned to it.

The Dim, Private, Public, ReDim, and Static statements only declare a
variable that refers to an object. No actual object is referred to
until you use the Set statement to assign a specific object.

The following example illustrates how Dim is used to declare an array
with the type Form1. No instance of Form1 actually exists. Set then
assigns references to new instances of Form1 to the myChildForms
variable. Such code might be used to create child forms in an MDI
application.

Dim myChildForms(1 to 4) As Form1
Set myChildForms(1) = New Form1
Set myChildForms(2) = New Form1
Set myChildForms(3) = New Form1
Set myChildForms(4) = New Form1

Generally, when you use Set to assign an object reference to a
variable, no copy of the object is created for that variable. Instead,
a reference to the object is created. More than one object variable can
refer to the same object. Because such variables are references to the
object rather than copies of the object, any change in the object is
reflected in all variables that refer to it. However, when you use the
New keyword in the Set statement, you are actually creating an instance
of the object.

Just doesn't make enough sense to me for me to be able to learn it :(


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Daminc
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