I have develped an app that uses a MapPoint Control that creates a map with
a pushpin based on Lat/Lon. I would like to allow users to be able to
zoom-in or zoom-out on the Pushpin, but not re-search, find, or browse to
different locations.

Programmatically, I have only been able to control the entire "Navigation"
toolbar (e.g.

Code:

MPC.Toolbars.Item("Navigation").Visible = False

). Is there a way to enable only Zoom control or disable the other
navigation features?

I think you're right, just remove the whole Navigation toolbar. Then create your own buttons that do the zoom in/out..