How can I convert my TC objects in VB.Net to a compatible var type

Unfortunately, while this works for VB.Net objects, it does not work when you pass in C# var objects.  For example, take the following method:

        public static void SetTextFieldValue(object textfieldObject, string value, bool useTabToExit = true)

        {

            var textfield = new var(textfieldObject);

            // .... do stuff here 

         }

if you pass in a var as the textfieldObject parameter, it fails with the (useless) exception of "var(VarDelegate)"