<div>
usual a try to open the file exclusive should tell you if you can do this,<br />
if you can -&gt; the file is not in use<br />
if you not can -&gt; the file is use<br />
<br />
guess this does the suggestion of &nbsp;Johnjces already,<br />
it could be done with a TFileStream aslo<br />
<br />
meikl ;-)<br />

</div>


usual a try to open the file exclusive should tell you if you can do this,
if you can -> the file is not in use
if you not can -> the file is use

guess this does the suggestion of  Johnjces already,
it could be done with a TFileStream aslo

meikl ;-)


<div>
<div class="content wysiwyg-content">
How can I easily determine if a file is already open before I try to open it programatically.<br />
<br />
Specifically, my program involves displaying pdf files in Acrobat Reader. &nbsp;If the user already has one the pdf file open, how can detect that?<br />
<br />
Thanks!
</div>
</div>


How can I easily determine if a file is already open before I try to open it programatically.

Specifically, my program involves displaying pdf files in Acrobat Reader.  If the user already has one the pdf file open, how can detect that?

Thanks!

Determine if a file is open

Delphi is the most powerful Object Pascal IDE and component library for cross-platform Native App Development with flexible Cloud services and broad IoT connectivity. It provides powerful VCL controls for Windows 10 and enables FMX development for Windows, Mac and Mobile. Delphi is your choice for ultrafast Enterprise Strong Development™. Look for increased memory for large projects, extended multi-monitor support, improved Object Inspector and much more. Delphi is 5x faster for development and deployment across multiple desktop, mobile, cloud and database platforms including 32-bit and 64-bit Windows 10.