The errorMessage attribute is the text of the error message that is displayed when the user input error is found.

The errorView attribute is the part on the Form part or the Window part where the last error was found.

For more information on the self attribute, refer to Using the self attribute.

The verificationRoot attribute specifies the Form, Window, Group Box, or other parent part you want to check for user input errors.

For example, you can connect the verificationRoot attribute of the Form Input Checker part to the self attribute of a Window or Group Box part to check for user input errors on all of the controls on the window or in the group box.