setthreadpriority[,setprioritythread,threadsetpriority]
Set thread priority in the debuggee.

arguments 
  arg1: ThreadId of the thread to change the priority of (see the Threads tab).

  arg2: Priority value, this can be the integer of a valid thread priority (see MSDN) or one of the following values: "Normal", "AboveNormal", "TimeCritical", "Idle", "BelowNormal", "Highest", "Lowest".

result
This command does not set any result variables.