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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt">Hello there</span><span style="font-size:10.5pt">，<span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt">I want to know if there is a feature allow user to add lock on a file when their app is modifying that file, so that other apps could use the file when its unlocked.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt">Lei <o:p></o:p></span></p>
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