After defining a new TextBox class with a statement like the following:

Public WithEvents tbox As MSForms.TextBox

I can select the tbox class from the object drop-down list in VBE, BUT
the BeforeUpdate event is not available in the procedure drop-down.
Many of the other TextBox events (Change, for example) are available,
but I would like to handle the BeforeUpdate event.

Can anyone help me figure out what do do to make the missing event(s)
available to my class?

Thanks VERY much for any help,
Bruce Reid