I want to have four CheckBoxes A, B, C and D:
B,C and D change their status on mouse click, in the usual way. And A is checked automatically only when all B, C and D are checked, A doesn't response to mouse click.
The CheckBox status can also be saved.
Can anyone help me with that?
ocmd
from packageocgx2
can do similar work, but the status cannot be saved. So I wonder if there is a way to do this.