How can I/O priority of a process be increased?

Question

I want to increase the I/O priority of a process. Answers for both .NET and Windows Vista would be nice. processexplorer is ok as well.

Answer 1

Just an update for this - it can all be done via .NET without resorting to WinAPI ...

// Set the current process to run at 'High' Priority
System.Diagnostics.Process process = System.Diagnostics.Process.GetCurrentProcess();
process.PriorityClass = System.Diagnostics.ProcessPriorityClass.High;

// Set the current thread to run at 'Highest' Priority
Thread thread = System.Threading.Thread.CurrentThread;
thread.Priority = ThreadPriority.Highest;

I've tried the above setting the process priority in a WPF application and it works fine. Haven't needed to set thread priority.

EDIT: this above relates to CPU priority of a process, as opposed to I/O priority, however there may be some correlation / connection between a process's CPU priority and its I/O priority.