setToDefault Method
Sets a specified style attribute to its default value.
expression.SetToDefault(strAttributeName)
expression Required. An expression that returns an IFPStyleState object.
strAttributeName Required String. The name of the style attribute. You can get a list of style attributes from the CSS Reference on the Microsoft Developer Network (MSDN) Web site.
Remarks
Use the apply method to apply the changes to the text range or element.
Example
The following example resets the background color and font size of the selected text to its default value.
Dim objSs As IFPStyleState
Dim objRng As IHTMLTxtRange
Set objRng = ActiveDocument.Selection.createRange
Set objSs = ActiveDocument.createStyleState
With objSs
.gather objRng
.setToDefault "background-color"
.setToDefault "font-size"
.Apply
End With