How Do I allow a user to move a window if the window does not have a title bar?

I plan to make a program that starts as a small floatable button which the user can covieniently move around their screen into a desired position. When the button is DblClicked my program will Show it's second page that conatains the grit and grunt functions.

If it helps, I'd say that I am looking for the coding simular to what the ICQ's "float Name" option does. Can anyone help me out?

I appreciate any time and effort,
Daniel Christie