CheckBox 
The checkbox enables the user to select a boolean value (true/false). The UI element consists of a graphic with text. The checkmark in the box indicates that the option is selected and the value is set to true. Definition The Web Dynpro class Checkbox which implements the IWDCheckBox interface is the base class of checkboxes.
activateAccessKey
Indicates whether access key for this control is activated. More information: Enabling Access Keys
checked
Specifies whether or not a checkbox is selected. The boolean value true indicates that the option is selected. A checkmark appears in the graphic that is displayed on the screen.
explanation
Specifies the explanation text. More information: Explanation
readOnly
Specifies whether or not the user can check the checkbox.
state
Describes the error status of the UI element. The data type of this property corresponds to the enumeration type WDState.
explanation
Specifies the explanation text. More information: Explanation
readOnly
Specifies whether or not the user can check the checkbox.
state
Describes the error status of the UI element. The data type of this property corresponds to the enumeration type WDState.
onToggle (boolean checked)
The onToggle event is triggered when the user clicks the CheckBox. The parameter is the new status.