You can use the Expression2 property to return the values of a conditional format within a FormatCondition object. Read-only String.
expression.Expression2
expression Required. An expression that returns one of the objects in the Applies To list.
The Expression2 property is available only by using Visual Basic.
Conditional formatting can also be set on a combo box or text box from the Conditional Formatting dialog box. The Conditional Formatting dialog box is available by clicking Conditional Formatting on the Format menu when a form is in Design view.