How can I focus cursor at specific position?

Question

Possible Duplicate:
Programmatically move the cursor to a desired location on the screen

I made a Button with the name of "Click",if we have to click on Button,CreateDialog will appear with two InputFields and one Button.

I want to focus the cursor in the first InputField,whenever we have to press on Button(Click)

       first = Null;
       second = Null;
       Button["Click", 
              (*Button Action Start from here*)
              (CreateDialog[Grid[{{Style["first", Bold],InputField[Dynamic[first]]},             
                                  {Style["Second", Bold],InputField[Dynamic[second]]},  
                                  {Button["Ok",DialogReturn[]],SpanFromLeft}}]]
              )(*Button Action closed here*),
             ImageSize -> {180, 60}
             ]