Locked property is the original panel property and, when set True, would only prevent the control from being moved or resized.
One thing that seems to work is to use the MaiForm's Load event and put this code:
Private Sub MainForm_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.LockerPanel1.LP_ControlledLock = True
Me.LockerPanel1.Value = True
Me.LockerPanel1.LP_ControlledLock = False
End Sub
This assumes that the LP_ControlledLock property was NOT already set to True in the DesignMode (if it was set then comment out or remove the first and the last line of code inside this sub).