Customization Guide (.pdf) - Documentation & Online Help - Autodesk

Absolute Referencing of Pull-Down and Shortcut Menu Items
In addition to referencing a menu item, you can activate or deactivate a menu
item with the $Pn=xxx syntax. This is the format:
$Pn.i=xxx
The $ loads a menu section; Pn specifies the active menu section (0 through
16 are valid values); i specifies the menu item number; and xxx (if present),
specifies a string of grayed out or marked characters.
Using the $Pn=xxx syntax, the following example adds a check mark to item
1 in the POP7 section.
$P7.1=!.
Menu item numbering is consecutive regardless of the hierarchy of the menu.
To make it easy for an item to address itself regardless of its location in the
menu hierarchy, use these forms:
$P@.@=xxx References the current or most recently chosen command.
$P@.n=xxx References item n in the current or most recently chosen menu.
Quick Reference
Commands
CUI
Manages the customized user interface elements in the product.
Swap and Insert Pull-Down Menus
Using the Customize User Interface (CUI) Editor, you can use workspaces to
control the swapping of pull-down menus. However, you can also swap one
pull-down menu programmatically for another (for example, when a user
loads an application that requires an additional menu).
Swap Pull-Down Menus
Because the program has cascading pull-down menus, there is little need to
swap menus. Also, swapping menus can detract from the consistency of the
user interface. However, using $ commands, you can swap pull-down menus
and submenus. An alternative to menu swapping involves relative (or global)
230 | Chapter 4 User Interface Customization