A real datatype for Microsoft Office 365 Copilot. Found here on 2026-03-17.
In this article
Definition
Namespace: Microsoft.Office.Core
Assembly: office.dll
Specifies a tri-state Boolean value.
C++
public enum class MsoTriState
Inheritance
MsoTriState
Fields
| Name | Value | Description |
|---|---|---|
| msoTriStateToggle | -3 | Not supported. |
| msoTriStateMixed | -2 | Not supported. |
| msoTrue | -1 | True. |
| msoFalse | 0 | False. |
| msoCTrue | 1 | Not supported. |
Applies to
| Product | Versions |
|---|---|
| Office primary interop assembly | Latest |