Checkbox In RibbonX

I have a RibbonX checkbox that I have added to my ribbon. I am able to attach code to the OnAction callback and when the user clicks the box, the code executes properly. Now for my issue. How can I change the checkbox from checked to unchecked and vice versa within VBA?

My situation is this:

I store a list of employees with certain elements such as start date, department, title, etc. in a table. One of the fields is Inactive which shows whether they are active or inactive. I may want to see all the employees, or just the active ones. My checkbox will allow the showing of both inactive and active employees. The user may wish to save the default setting for this and so I have created a table that holds a Boolean True or False for whether to show inactive employees or not by default. The checkbox always shows unchecked by default when the workbook loads, and I want to change the textbox's checked state based upon the value in the table.