Dynamic Menus?

How do you adjust popup menus while a program is running? For example, if I have a popup menu that comes up when the user presses the mouse button, with 3 items (which are defined in the resoures file), how can I add/remove items during the program''s execution? Can I do this, or is this menu unchangable once the program starts? Thanks! MENU1 MENU DISCARDABLE BEGIN POPUP "The menu" BEGIN MENUITEM "Item1" ITEM1 MENUITEM "Item2" ITEM2 MENUITEM "Item3" ITEM3 END END *====================* http://www.syntasoft.com *=======================*