How to check for duplicate record before inserting

I have a table that I am inserting records into based on certain criteria. The code is as follows:

CurrentDb.Execute ("INSERT INTO [Activities] (ClaimNo, Custodian, Activity, DateStamp) VALUES ('" & Me.pendclaimnum & "','" & Me.Custodian1 & "','PCAC',#" & Int(Now()) & "# )")

I'd like to make it so, if the values of Me.pendclaimnum and PCAC already exist in the table, not to insert them. Would this be achieved by running a select query and then comparing the recordset/results? Not quite sure how to approach this, It needs to run relatively fast as well... Any help would be awesome!

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Rey Obrero (Capricorn1)Commented:
you can use a dlookup or dcount

if dcount("ClaimNo","Activities","[ClaimNo]='" & Me.pendclaimnum & "' And [Activity]='PCAC'")>0 then

msgbox "Record already exists"


CurrentDb.Execute ("INSERT INTO [Activities] (ClaimNo, Custodian, Activity, DateStamp) VALUES ('" & Me.pendclaimnum & "','" & Me.Custodian1 & "','PCAC',#" & Int(Now()) & "# )")

end if

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c9k9hAuthor Commented:
I always seem to over complicate things and neglect those dlookup functions!

c9k9hAuthor Commented:
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