Option Explicit On
Option Strict On
 
Public Class Form1
    '// Designerregion
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles MyBase.Load
        For a As Integer = 0 To 100
            Me.ListBox1.Items.Add("item:" + a.ToString)
        Next
    End Sub
 
    Private Function searchItem(ByVal s As String) As Integer
        For a As Integer = 0 To Me.ListBox1.Items.Count - 1
            If Me.ListBox1.Items.Item(a).ToString Like s Then
                Return a
            End If
        Next
        Return -1
    End Function
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button1.Click
        Me.ListBox1.SelectedIndex = Me.searchItem("item:1?") '// > findet item10
        '// oder: 
        Me.ListBox1.SelectedIndex = Me.searchItem("item:1*") '// > findet item1
    End Sub
End Class