how to remove this Screen tip (Press F1 for more Help) from my word Addin on mouse over any button in Ribbon

Hi all,

Currently i am working on an addin, in which i am having a Ribbon.In that Ribbon, If i move the mouse over any button I am getting my Feature description(description of that button) as well as Screen tip(myAddin name,Press F1 for more Help).


my question is how to remove this Screen tip "Press F1 for more Help".

Any help can be greatly appreciated.

Thanks,
K.S.R. Prasad.