Prevent closing userform
 

In a userform I have a button to some HTML helppages. I use this code:

Link = Range("Test!B28").Value
On Error GoTo Nocando
ActiveWorkbook.FollowHyperlink Address:=Link, NewWindow:=True
Unload Me
Exit Sub
Nocando:
MsgBox "Cannot find" & Link
start.Show

But: the userform closes also with this action. How can I prevent that?

Regards, Gert-Jan