Expression Editor comprises two components.
The following image illustrates constituting components of Expression Editor control and their respective elements.
Expression TextBox: A text box that enables user to create and edit expressions.
Operator Buttons: Buttons that represent shortcuts for operators.
Category Selection: A tree view which contains available functions, operators, fields and constants.
Items: A list box that lists the items selected from the Category Selection section.
Description Panel: A panel that displays the description of the item selected from the Category Selection section.
