close down user control in Internetpage

I have made a chat box with 2 exe files, when i shutdown one of these applications a unload function starts to run en de application disconnect at the right way

unload function:
Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
If noc = 0 Then Exit Sub
For i = 0 To 5
If ws(i) = 1 Then
If win(i).State = sckConnected Then
ws(i) = 2 'for sendcomplete()
win(i).SendData "Server shutdown!"
DoEvents
End If
End If
Next i
End Sub

I want to use one of these applications to make a user control but i have one problem, when i use the button disconnect in the user control there are no problems because he disconnect at the right way, but when i use ctrl+F4 to shutdown the internetpage the user control does not disconnect at the right way,

question:
what must i use to disconnect the user-control the right way. In a exe file is this the function unload but what is that in a user control, i have tryed terminate but this doesn't work. kan someone help me with this problem.

enterprise,
The Netherlands

Why not have the controlling program send a signal to the Internet version which, upon receiving it, calls the Unload Form function. Maybe in the form of a bogus message since it is a chat. When the Internet version sees the message, it invokes the Unload Form