This control creates a check box to display a choice between one of two possible options. When it is checked it holds a true value in the XML and it becomes empty string when it is unchecked. You need to set type of "Check" in the data model to use it when designing form.
Form Design Actions
Clicking on a control pops up a design actions menu with the following options:
Design
Label
It is the caption of the checkbox in the user interface.
Hints The text entered in this area pops up when you hover the field.
Data
Bound XPath XPath of the element. If set to empty, it uses the parent XPath.
Checked Value
It represents true value.
Unchecked Value
It represents an empty string value.