Hola.
una forma
Andate a referencias y chequea "Microsoft internet controls"
Luego pone dos command button
Código:
Option Explicit
Dim ie As New InternetExplorer
Private Sub Command1_Click()
ie.Navigate ("www.google.com")
ie.Visible = True
End Sub
Private Sub Command2_Click()
ie.Navigate ("www.yahoo.com")
ie.Visible = True
End Sub
Private Sub Form_Load()
Command1.Caption = "Google"
Command2.Caption = "yahoo"
End Sub
Private Sub Form_Unload(Cancel As Integer)
On Local Error Resume Next
If Not ie Is Nothing Then
ie.Quit
Set ie = Nothing
End If
End Sub
Acá tene sun ejemplo para modificar otras propiedades
Acceder al internet explorer desde vb
..saludos
--------------------