I would like to check which objects are selected/active.

In PowerPoint and Word it is quite easy, but in Excel... nothing what I checked is working. Globals.ThisAddin.ActiveWindow.Selection is of type: dynamic. 
I added reference to VisualBasic, to have an access to TypeName function.

If chart is selected it returns type "ChartObject"... so I am setting it to variable of ChartObject type, but then I have no access to almost any of its properties and methods, for example when I try to read name that object or trying to return chart from it gives me an error.

When there is few shapes selected then TypeName function returns me type: "DrawingObjects"... but I am not able to read anything from it. I was trying to get get from it ShapeRange, but again... errors.

Could you advise me how to get all selected objects?