Limiting Duplicates

I am required to prevent duplicate posts........how can i do this?? my database is MS Access and am using ASP.

Have been scratching my head fo quite some time now........cant figure out the logic.

I understand i cant limit it from the database....if possible i'd like to know how to handle the error that it would give with a page with message

or how can i compare the entry from the database before i post it

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Limiting Database

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I have a hunch it has something to do with the <% Do While not objRS.EOF %> code?

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==========
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<%
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<%
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<%
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