Hello everyone. I am developing my project. I am using checkboxes, combobox and a button. I select an item from combobox let me say it is Prof DR JOHN NHOJ and I am clicking more than one check boxes. For example barcelona, apple, NYC and bus are ticked for Prof DR JOHN NHOJ. I am clicking save button. Until here everything is Ok. However for the second try. I want to disable barcelona apple, NYC and bus checboxes. For example I will chose another person from combobox and I will assign Real Madrid; grapes; RI, train for this person. I don't want to see barcelona, apple, NYC and bus checkboxes enabled. Is there any solution ?