Combobox and BindingNavigatorPositionItem

I am trying to find a way to update the BindingNavigatorPositionItem and executes the BindingNavigatorPositionItem.
I have the combobox bounded to a dataset and it is filled with information alread.

I know the combox list is in order of the dataset, so whatever the combox selectedindex will be the position that I need to update the BindingNavigatorPositionItem and that will refresh all the other text fields I have in the application.

I am able to get the BindingNavigatorPositionItem.Text to chage but How to get it to execute, like it would when I press the BindingNavigatorMovePreviosItem, BindingNavigatorNext, or Like when I manually change the number and press enter for it to change.....

Thanks
Stormen81