Operador Is

Tests if two Basic variables refer to the same object instance.

result = oObj1 Is oObj2

If oObj1 and oObj2 are references to the same object instance, the result will be True.

The example below first defines a new type Student. Calling TestObjects creates the object oStudent1 as a new object of this type.

The assignment oStudent2 = oStudent1 actually copies the reference to the same object. Hence the result of applying the Is operator is True.

Type Student
    FirstName as String
    Program as String
End Type

Sub TestObjects
    Dim oStudent1 as new Student
    Dim oStudent2 as Variant
    oStudent2 = oStudent1
    MsgBox Student1 Is Student2 ' True
End Sub

The example below returns False because oStudent1 and oStudent2 are references to two different object instances, each created with the New operator.

Sub TestObjects_v2
    Dim oStudent1 as new Student
    Dim oStudent2 as new Student
    MsgBox oStudent1 Is oStudent2 ' False
End Sub