Can't set value into variable due to can't found a property call "WndCaption" in the object

As I have watched the video "Using Variables in Keyword-Driven Tests" that teach how to declare a variable and auto set the variable into text field by select an object WndCaption.



But I have face an problem that, the object that I have point can't found a property call "WndCaption", so I would not able to set the variable value to the object's value.



I have print screen the result of object property I have found, but I still can't found the WndCaption even I select "Advanced View".