$16\mathrm{.}4\mathrm{.}2$ How do you test if a check box is selected?

$16\mathrm{.}4\mathrm{.}3$ Can you apply all the methods for Labe$1$ed to CheckBox?

$16\mathrm{.}4\mathrm{.}4$ Can you set a node for the graphic property in a check box?