Selection.ExtendMode Property (Word)
True if Extend mode is active. Read/write Boolean.
When Extend mode is active, the Extend argument of the following methods is True by default: EndKey, HomeKey, MoveDown, MoveLeft, MoveRight, and MoveUp. Also, the letters "EXT" appear on the status bar.
This example moves to the beginning of the paragraph and selects the paragraph plus the next two sentences.
With Selection .MoveUp Unit:=wdParagraph .ExtendMode = True .MoveDown Unit:=wdParagraph .MoveRight Unit:=wdSentence, Count:=2 End With
This example collapses the current selection, turns on Extend mode, and selects the current sentence.