Using the Expression editor in controls

The Expression editor allows you to use VB operators and functions, while respecting a predefined syntax. You can identify the properties that can be configured using VB expressions by the "tune" icon .

Expressions must reference the property name given in the app page. For example, to reference the main page, include the snippet MainPage in your expression. If you rename the main page to FirstPage, include the snippet FirstPage in your expression.

All custom Apps utility functions are grouped under a single interface that makes them easier to discover. This way, you only need to type in App. , and a list of available functions unfolds.

Note:

By default, when you use the Tab key in the expression editor, the system inserts a space in the expression.

To enable keyboard navigation using the Tab key, use the Ctrl + M shortcut on Windows, or the Ctrl + Shift + M shortcut on Mac OS X.

After you apply this shortcut, pressing Tab switches the focus to the next selectable item on the page.

Using the Expression editor

To unlock the power of VB expressions in your app:

1. Create a new app.
2. Drag and drop controls in the app pages, or configure rules and events.
3. To edit the General properties of a control, or to configure an event rule, look for the "tune" icon .
4. For the desired property, click Open expression editor and start writing your VB expressions.