errorCallback

The errorCallback can be specified for all commands containing object class options.

This callback is used when an error was detected in a callback command or procedure. The vtcl server specifies a call to the errorCallback on the closest parent widget or ancestor of the widget for the callback in which the error occurred.

The errorCallback contains these additional key/value pairs:

callback

callback that the error occurred in

result

error string that the error created

returnCode

error return code that caused the callback