Try this. Make a Form with a CommandButton and put the following code into it.

Code:
Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long

Private Sub Command1_Click()

    'Open www.vb-world.net
    Retval = ShellExecute(0&, vbNullString, "www.vb-world.net", vbNullString, "C:\", 1)

End Sub