AutoCAD .NET :: Select Object Command Prompt

I'm creating a VB.Net routine which will run the REVCLOUD command.  In my application I prompt the user to select a single polyline using:

EntRslt = acDoc.Editor.GetEntity(EntOpts)

Then later I run the REVCLOUD command using:

acDoc.SendStringToExecute("_revcloud Object Poly No ", False, False, True)

Where Poly is the polyline I selected earlier.  Of course, the line above doesn't work since "Poly" is interpreted as a string.  But I would like to figure out how to pass my VB.Net selected Polyline into the REVCLOUD command.

How I might do this?  The REVCLOUD command will not accept the "Previous" selection set so setting the Implied Selectoin does not work.  If my Polyline was the Last object in the database I could use the "Last" option, but it isn't.