Gets the width of a dividing line between two columns. If this property's value is zero there is no dividing line. Otherwise it is a value in twips. Takes a callback function with one parameter as a parameter. The callback function is called with the value as parameter upon receiving the information from the server.
A function with one parameter is called with the width of a dividing line between two columns.
The property's default value is 0. The property returns its default value when the text selection contains multiple sections with mixed setting.