Softwaretimer

Hi Guys,
I hope you can help me out with my problem,

How can I create a Softwaretimer that counts exactly 10 seconds!

..so I can call up a function a the first second,
and end this function after ten seconds.

I mean
{
 start timer
  1 second
    start function
     10 seconds
       end function
}

the function have to run throgh the 10 seconds, to get some values

Thx