property Edit.IndentOnTab as Boolean
Specifies whether the multiple lines selection is indented when user presses the TAB key.

TypeDescription
Boolean A boolean expression that indicates whether the selection ( multiple lines ) is indented when user presses the TAB key.
By default, the IndentOnTab property is True. Use the IndentOnTab property to disable indentation when user presses the TAB key. Use the IndentSel property to indent the selection by code. Use the UseTabKey property to specify whether the control handles the TAB key.