suggestion for using getControl()

Hi everyone here,

I am confused with getControl() usage, in JavaDoc there are several overload getControl() methods to use.

`Control`	`getControl(java.lang.String strName)` Get an existing control.
`Control`	`getControl(java.lang.String strName, java.lang.Class cl)` Get control, creating it is it does not exist.
`Control`	`getControl(java.lang.String strName, int nIndex)` Get an existing indexed control.
`Control`	`getControl(java.lang.String strName, int nIndex, java.lang.Class cl)` Get indexed control, creating it is it does not exist.

I saw most webtop source code use getControl(String, Class) instead of getControl(String), why?

Using getControl(String , Class) might accidentally create a control which doesn't exist on JSP originally, right? and this might cause error.

using getControl is much safer.

(I just encountered this error, before I checked the javaDoc, I thought those methods just the same.)