Have the code call uibuttongroup() to construct the button manager.
Have the code call uicontrol('style','radio') with appropriate Position information and with Parent set to the uibuttongroup.
Because the user could have an indefinite number of webcam (people have posted with configurations of up to 14 webcams), you need an indefinite amount of space for all of those buttons. For this reason it is more common to use a drop-down menu to select the camera.
