How to check whether checkbox is checked or not and to get label if checked

Hi,

I've used checkboxgroup, and i'm populating it dynamically using attribute node & attribute value.. like this

IPrivateTestView.IWelcomNode wNode =wdContext.nodeWelcom();

IPrivateTestView.IWelcomElement wEl,wE2,wE3;

wEl=wNode.createWelcomElement();

wNode.addElement(wEl);

wEl.setWelValue("Welcome Boards");

wE2=wNode.createWelcomElement();

wNode.addElement(wE2);

wE2.setWelValue("Traditional Welcome");

wE3=wNode.createWelcomElement();

wNode.addElement(wE3);

wE3.setWelValue("Photograph");

.....

now i want to check whether checkbox is checked and how many checkbox has been checked and then i want that label values of checked boxes.. so pls help me out. if possible give me some sample coding...