Lets the user choose from the values 'True', 'False' and 'Unspecified' using a dropdown. The last choice is omitted if the field does not allow null values.
Appearance when closed.
Clicking the control reveals the two options. The language in the drop down list will match the logged on user's language setting.
A boolean dropdown can also have a "no value" choice, in which case the red star is not shown.
Retrieves the default value for the control.
This call is only made if there is a field validation set for the field info and the field has any content.
Performs field validation when the user leaves the field or one of its dependencies is changed, initial values set by default value and initial values in edit-mode are not validated.
When saving the validation runs server side if the field value has changed. A field value is considered changed if in new mode the value is anything other than
NULL. In edit mode it is considered changed if it has a value that was not returned by the GetEditFields procedure.