Use the HasCheckBox property to associate a check box to your editor. Use the CheckState property to change the check box state. Use the PartialCheck property to allow two ( unchecked, checked ) or three ( unchecked, checked, partial-checked  ) states to your check box. The CheckStateChanged event notifies your application that the control's check box state is changing.

The following sample assigns a check box to an editor of Date type:

Private Sub Form_Load()
    With Editor1
    
        .Value = Date
        .EditType = EXEDITORSLibCtl.Date
        .HasCheckBox = True
        .CheckState = Checked
        
    End With
End Sub