Java Applet: Create a Frame to choose a screen area

I want to create a applet which alows the user to select an area on the users screen. The overlay I want to create should be the same as screenr.com uses it. http://www.screenr.com/record

// Edit What I want to setup is a applet which allows me to create screenshots from a area. At the moment开发者_开发百科 I create a new frame with the applet. This frame is transparent and contains a panel which can be dragged and resized. This panel is also transparent but it has borders. So more or less everything works right. Taking screenshots works well, uploading them too.

My problem now is, that the user cant click anything on his screen because my frame overlays the whole screen.