Priority of an application

Hello,

I asked a question about the priority in Windows XP here. I got one answer and it apparently does not work.
The question is: is the priority shown in the Task-Manager always the real priority? Or can there be a difference?

Edit: With the installation of the service pack 3 of WinXP, it shows the expected priority in the task manager.

From serverfault Burkhard

• I believe an application may change it's own priority. Have you tried changing the priority in Task Manager and seeing if it sticks?

  Burkhard : It is changed as expected.
  From Rizwan Kassim

• I'm not sure what you mean by "real priority". The schedule will increase and decrease the priority of threads depending on many factors. For example, it will slightly boost the priority when you bring an application to the foreground to make it more responsive.

  Burkhard : By "real priority" I mean the priority shown in the task manager.
  From Jesse Weigert