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Tip of the Day
Language: Visual Basic
Expertise: Intermediate
Dec 4, 2000

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Union Structure in Visual Basic


When using C++, the Union enables programmers to look at the same memory area from different perspectives. The same is possible in Visual BASIC. There is an LSET statement that allows two variables to be overlapped in the same memory area.
  
Private Type MyType1
    x as Integer
    y as Integer
    z as Integer
    w as Integer
End Type
 
Private Type MyType2
    a as Long
    b as Long
End Type
 
Private Sub Form_Load()
    Dim t1 as MyType1
    Dim t2 as MyType2
    t1.x = 0
    t1.y = 0
    t1.z = -1
    t1.w = -1
 
    LSet t2 = t1
    Call MsgBox (t2.a & 
Yiming Sun
 
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