which transparency?

[syun_ukiya]

how to do this type of transparency on xp?

[Lawr]

You can't unless it's part of the program.

[o_O]

Actually you can. There are a number of compositing management type programs you can use. <a href="http://home.insightbb.com/~ryanvm/tinyutilities/vitrite/">Vitrite</a> is one I've used before - it does the job.

[Baloki]

Powermenu is the screenshot you have there...

[crono_logical]

Some nvidia/ATI drivers can add similar options for you as well :p