muuy facilita con el ie...

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()
ShellExecute hwnd, "Open", Text1.Text, vbNullString, App.Path, 0
End Sub

Un saludo!

Rubén Vigón
Microsoft MVP Visual Basic

(Guía de buen uso del foro)
http://perso.wanadoo.es/rubenvigon/foro