how to handle multiple windows(popups) in selenium rc

suppose i click on a link and it will open a new window for that one i have to get the id of that window
for that one i write code like this

String str[]=selenium.getAllWindowNames();
selenium.selectWindow(str[0]);
selenium.setWindowFocus();
//but this also not worked for me for single window, suppose we felt that it works for single window but suppose after
// clicking on link it opens multiple windows how u can handle that one?

in selenium Rc vs2010,

the code should be like this ?
selenium.WindowFocus();