How to prevent the access of more than one person to an APEX application?

Hello,
I want to prevent the access to an application when it is already opened by another user.
How to do it?
Thank you by advance
Jean-Louis

Why would you want to do this? APEX applications are MEANT to be MULTI-USER WEB BASED APPLICATIONS? This makes NO SENSE..
If you need this functionality, you can do this in Access..
Thank you,
Tony Miller
Webster, TX

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How to prevent the access of more than one person to an APEX application?

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