When this property is set to True, characters typed will be inserted at the current caret position and any following characters will be shifted. When set to False, typing at an insertion point that contains an existing character will replace that character. The value of this property also affects how characters are deleted using either The Delete key or the Backspace key. When in insert mode, characters after the character being deleted will be shifted by one to the left within the section.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2