ReadOnly Element [Visio 2003 SDK Documentation]
Determines whether the action on a smart tag or shortcut menu is read-only.
The action appears on the menu but is read-only.
The action appears on the menu and can be selected (the default).
<ReadOnly> [Unit] [F] [Err]> </ReadOnly>
Optional string. Represents a unit of measure. The default is BOOL. For details about BOOL, see Units of measure.
Optional string. Represents the element's formula. This attribute can contain one of the following strings: "someFormula" if the formula exists locally, "No Formula" if the formula is locally deleted or blocked, or "Inh" if the formula is inherited.
If the attribute is not present, the element's formula is a simple constant. For example, <element>5</element>.
Optional string. Indicates that the formula evaluates to an error. The value of Err is the current value (an error message string); the value of the element is the last valid value.
When an action is read-only, it appears on the smart tag or shortcut menu but you cannot select it. It does not appear dimmed, but rather it appears on a colored background, like a label. To make the menu item appear dimmed, use the Disabled element.
cell (Actions section)