I posted this question on the VSTO forum and they suggested I also post here.

I have an Excel workbook that contains two named Ranges: OrderDate and
ShipDate. I'm using it in a VSTO solution with an Actions pane. When I select
either of these cells, I want the Actions pane to display a user control that
contains a label and a DateTimePicker control. I want the user control to
show up in the Actions pane only when one of these cells is selected, so I
have code on the ranges' Selected and Deselected event handlers to add (on
Selected) or remove (on Deselected) the control . I'm not including the code
here, but you can see it on my original post if you like:
http://forums.microsoft.com/MSDN/Sho...iteID=1&mode=1

The solution works fine when I put my cursor on OrderDate and then move to
ShipDate. It also works fine when I move from any other cell to either
OrderDate or ShipDate.

The solution does NOT work when I move from ShipDate to OrderDate. The
control is removed but not added. I added some message boxes and it looks
like the events are firing in the wrong order: The OrderDate_Selected event
fires BEFORE the ShipDate_Deselected event.

(In the OrderDate to ShipDate scenario the events fire as I would expect,
OrderDate_Deselected and then ShipDate_Selected.)

Is this expected behavior?

Just so you know, there's nothing special about the workbook. I was able to
recreate on a completely vanilla new workbook/project.

Thanks,
--jan