set ActiveX checkbox properties with VBA word 2010

I have searched high and low for this, but no luck.

To create a checkbox:

Selection.InlineShapes.AddOLEControl ClassType:="Forms.CheckBox.1"

However, there are several properties associated with a checkbox, and I wanted to find out how to set them as well when I am creating the checkbox.

For example, I tried this:

Selection.InlineShapes.AddOLEControl ClassType:="Forms.CheckBox.1", Caption:=""

But the code throws a "Named Argument Not Found" error while highlighting Caption:=""