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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<concept xml:lang="en" id="GUID-2D8093D7-58A8-59CD-96EF-5B0AAE029478"><title>Using Lock()</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>We can ask for a timer event to occur at a particular twelfth in the next second using the <codeph>Lock()</codeph> function.</p> <codeblock id="GUID-E6153332-DB58-55CF-959D-E3D5DC3FD47D" xml:space="preserve">...
TRequestStatus stat;
TTimerLockSpec lockspec;
RTimer timer;
...
timer.Lock(lockspec,stat)
...</codeblock> <p>The current time is A seconds + B milliseconds, then </p> <codeblock id="GUID-DF7B584A-9D21-55A1-883A-1CEA54B733DE" xml:space="preserve">Lock(EThreeOclock, stat);</codeblock> <p>will complete at C seconds + 3/12 milliseconds, where C=A, if B&lt;3/12milliseconds or C=A+1.</p> </conbody></concept>