Keyboard Conventions Keyboard Conventions Key combinations appear in the following format: Selecting, Choosing, and Pressing Items In a context involving windows, the terms select, choose, and press have different and specific meanings. Selecting an item usually means marking or highlighting it, as in picking a radio button. Selecting alone does not initiate an action. Choosing an item carries out an action. For example, choosing a menu item may open a window or carry out a command. You can also initiate an action by choosing a command button (a push button or a standard button). You often must select an item before you can choose it.
Often you can use a combination of keyboard and mouse techniques for selecting and choosing. Pressing refers to physical buttons or keys. For example, you press the ENTER key. By contrast, you select or choose a window button. Values, Variables, and Expressions The parameters to eV+ keywords can generally be satisfied with a specific value of the correct data type, a variable of the correct data type, or an expression that resolves to the correct type. Unless specifically stated otherwise, parameters can be replaced with a value, variable, or expression (of the correct type).
The most common case where a parameter cannot be satisfied with all three options occurs when data is being returned in one of the parameters. In this case, a variable must be used; the parameter description states this restriction. Integers and Real Values In the eV+ system, integer and real values are not different data types. When a parameter requires an integer value, and a real value (or an expression) is specified, the real value is rounded to an integer value (e.g., 2.6 is interpreted as 3). When a real value is required, an integer value is considered to be a special case of a real value with no fractional part (e.g., 6 is interpreted as 6.0).
eV+Operating System Reference Guide, 2.x,18321-000 Rev A Page 24 Notation Meaning KEY1+KEY2 A plus sign (+) between keys means that you must press and hold down KEY1, then press KEY2. For example, "Press CTRL+Z" means that you press CTRL and hold it down while you press Z.