Hi, I'm trying to find a application call "browser" and close it after. But when I call the function findwindow, it doesn't work. Can you please help me...here's my code

'Declare in the general part of the project
Private Declare Function FindWindow Lib "user32" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Private Sub cmdGo_Click()
MsgBox FindWindow(vbNullString, "browser")
'But the msgbox is not done....why???
End sub

THankz in advance