Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click
        Dim str As String
        str = "VB.NET TOP 10 BOOKS"
        If str.Contains("TOP") = True Then
            MsgBox("The string Contains() 'TOP' ")
        Else
            MsgBox("The String does not Contains() 'TOP'")
        End If
    End Sub
End Class