When editing an expression in the “Variables Control”, value set management dialog(see “Managing Value Sets”) or property grid (see “Viewing Parameters and Property Grids ”) a list of available variables, built-in constants and built-in functions are presented in a list box.
This list is dynamically filtered as you type to show items that match the content being typed. Items from the list can be selected by using the up/down arrow keys or by left clicking. Once highlighted, the item can be used to replace the word under the edit cursor by pressing the Tab or Enter key or by double clicking.
As functions are highlighted in the list, a tooltip is displayed to the right of the item that gives a description of the function. For variables, the expression is shown to the right. And for constants, the numeric value is shown to the right.