Button Group Panels - Visualisation problems with 2 monitors

BUTTON GROUP PANELS - VISUALIZATION PROBLEMS WITH 2 MONITORS

Description:
  Create the button group panel with some toggles button or radio buttons inside.
  The button group is created in a GUI displayed in the secondary monitor.
  To display the GUI in the secondary monitor, I've used the WindowAPI function.
  When clicking on one of the radio or toggle buttons, for an instant the 
  GUI returns in the main monitor and disappears from the secondary monitor.

Solution:
  Instead of create toggle or radio buttons, create push button and after that 
  change their style in toggle buttons.
  If you need an initial selected object, don't set it by the inspector property 
  but write the command in the editor in the OutputFcn_Callback.

This was a pretty annoying problem that I had. I'm sure this is not one of the main problems of Matlab, but I just hope this solution can be useful for someone.