VbTriState

Three-state values used in place of Boolean arguments where a “use default” option must remain selectable. Common in formatting functions such as FormatNumber, FormatPercent, and FormatCurrency.

Constant	Value	Description
vbTrue	-1	True.
vbFalse	0	False.
vbUseDefault	-2	Use the system default setting.

_{License: CC-BY-4.0 Code license: MIT Attribution: VBA-Docs}