Changes user data values for a timer.
Err TimerChangeUserdata (TimerHandle thandle, uint32 userdata1, uint32 userdata2)
Changes the user data associated with a timer. The user data is delivered to you as part of the notification message for message-based timers. The user data is not meaningful for signal-based timers.
Zero on success or a negative error code.
Library call implemented in lib3do.lib.
lib3do.lib, timerutils.h