android : widget long press & movement handling in user activity.

Question

hi, please suggest me a way to handle widget long press event & its movement in user defined home screen .i.e i have activity whose background handles the long click and then we can choose the approprait widget from the list ,but the problem is that i am not able to implement the long click on widget and its movement in my activity. for code reference see the link below

http://www.google.com/support/forum/p/Android+Market/thread?tid=25992cd433e6b826&hl=en thanks