How can you detect if your control is active in Design mode
or Runtime mode ?

Many Thanks

Here's one way..
'==================
Private Sub Form_Load()
   Debug.Print RunningIDE
End Sub

Private Function RunningIDE() As Boolean
   On Error Resume Next
   'The next line will raise an error
   'if running in the IDE. Not in Compiled code
   Debug.Print 1 / 0
   RunningIDE = (Err.Number > 0)
End Function
'==================

UserControl.Ambient.UserMode

This will return True if VB is in run mode or False if VB is in design mode.
Not sure what it returns if VB is in break mode.  Note that
AmbientProperties object is not available until after the Initialize event
has fired. See VB's help for more information.

Mike