Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, _
	ByVal e As System.EventArgs) Handles Button1.Click

        Dim str1 As String
        Dim str2 As String

        str1 = "Concat() "
        str2 = "Test"
        MsgBox(String.Concat(str1, str2))

    End Sub
End Class