Public Class frmMain Private Sub btnTest_Click(sender As Object, e As EventArgs) Handles btnTest.Click Dim name As String Dim age As Integer Dim i As Integer Dim user As ArrayList user = New ArrayList() For i = 1 To 3 user.Add("user" + i.ToString()) If i = 1 Then MsgBox("a" + i.ToString()) Else MsgBox(i.ToString()) End If Next name = "jzh" age = 35 MsgBox(name + " " + age.ToString()) For i = 0 To user.Count - 1 MsgBox(user.Item(i)) Next End Sub End Class