I know how to programmatically add menu items to the main ENVI menu bar (ENVI_DEFINE_MENU_BUTTON) and have used it successfully. However, right now I would like to add some conveniences to the menu that pops up when I right-click on a file in the Available Bands window. I am not having success with my attempts to implement ENVI_DEFINE_MENU_BUTTON. What are the tricks?