TextRange Property
Returns a TextRange object that represents the selected text (Selection object) or the text in the specified text frame (TextFrame object).
expression.TextRange
expression Required. An expression that returns one of the above objects.
Remarks
You can construct a text range from a selection when the presentation is in slide view, normal view, outline view, notes page view, or any master view.
Example
This example makes the selected text bold in the first window.
Windows(1).Selection.TextRange.Font.Bold = True