[MSDN Library June 1998] 14.1.1.2 Setting Up Context for an IoTimer Routine (29.5018574805809%)
MSDN Library Visual Studio 6.0 > DDK Documentation > Microsoft Windows NT 4.0 DDK > Kernel-Mode Drivers > Design Guide > Chapter 14 IoTimer and CustomTimerDpc Routines > 14.1 Timer Routine Requirements > 14.1.1 IoTimer Routine Requirements