You can customize almost any control in LabVIEW (with the exception of the dialog controls). Check out the LabVIEW help. To start the process, you can either select
File->New, then select
Custom Control in the dialog, or right-click your control and select
Advanced->Customize. Either method will get you to a custom control you can modify, save, and use just like any other control. See the help for details of how the editor works.