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The editor today takes you to understand how to deeply understand listindex in the VB language. The knowledge points in the article are introduced in great detail. Friends who feel helpful can browse the content of the article with the editor, hoping to help more friends who want to solve this problem to find the answer to the problem. Let's follow the editor to learn more about "how to understand listindex in VB language".

Listbox control

Listindex action

It can be used to observe that which item is currently selected, the first position is represented by 0, and the second position is represented by 1, similar to an array.

If it is not checked, List1.ListIndex returns-1

Note: List1.ListIndex =-1 triggers a click event

List attribute entry data wrap shortcut key

Ctrl+enter

Summary

1. You must practice on the computer to prove it.

2. Learn to debug the code and break the point.

3. Master the functions of listindex

4. pay attention to the training of logical thinking

Software interface design:

Source code sharing:

Dim f As Boolean'f indicates whether it can be selected, and the default mark is Dim lastindex As LongPrivate Sub Form_Load () List1.FontSize = 20.

End Sub

Private Sub List1_Click ()

If List1.ListIndex = lastindex And List1.ListIndex-1 And f = True Then List1.ListIndex =-1 f = False Else f = TrueEnd If

Lastindex = List1.ListIndex

End Sub

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