Syntax	GUI.SetCheckBox (widgetID : int, status : boolean)
Description	Sets the status of a check box specified by widgetID. If status is true, the check box is filled (marked with an 'X'). If status is false, the check box is set empty. GUI.SetCheckBox calls the check box's action procedure with the new status and redraws the widget with the new status.
Example	See GUI.CreateCheckBox for an example of GUI.SetCheckBox.
Status	Exported qualified. This means that you can only call the procedures by calling GUI.SetCheckBox, not by calling SetCheckBox.
See also	GUI.CreateCheckBox.