That did not work.
Thing is that I have two combo-boxes, in one I have some marks like VZ HJ MK, and in other one I have name of Cities.
I have to make when I choose in combo-box VZ that he removes record Cities in other combo-box, if I in step before that choose HJ which enables Cities combo-box, and I choose one of City, and then I choose VZ. And when I choose VZ it must remove Cities.
thx.