Properties sheet icon

Neil and markiewb, thanks.

Now i see the real problem.

If the application start without the properties window open, and i open with the command: 

TopComponent window = WindowManager.getDefault().findTopComponent("properties");

and set the icon with: 

window.setIcon(Utilities.FEATURE_PROPERTY_IMAGE);

OR

window.setIcon(ImageUtilities.loadImage("/com/jsound/images/music--pencil.png"));

works fine, but if i close the application with the properties open, the platform save and remember to next open, and in this case, the properties window open with the application and show the original icon.  [Shocked]