Disabling the undo function in word VSTO

I am developing a Wordaddin using visualstudio 2017 for word 2016 .i want to disable the undo when i am enabling a toggle button.

You simply need to repurpose the Undo button. See Temporarily Repurpose Commands on the Office Fluent Ribbon for more information.

You can find the idMso values of built-in controls in the following documents:

• Office 2010 Help Files: Office Fluent User Interface Control Identifiers
• Office 2013 Help Files: Office Fluent User Interface Control Identifiers
• Office 2016 Help Files: Office Fluent User Interface Control Identifiers