numbering checking

I have a form that displays information of courses. So when I click one of the courses I want to print a certificate for it. My question is how can I make this number to increase. I want to start the first certificate to print like this 0001 and the next one will increase like 0002, etc.
So my question is: how can I go and check the last certificate printed to my access database and then print the next one?

thank you for your help...

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Actually I think it should be strGetNumber = .Fields(0)  <-- Meaning the first field retrieved instead of referencing by name.

If you want to use a name, change your sql to

 strCheck = "SELECT MAX(Certificate) AS Certificate FROM Course_Registration"

and then leave the other line as: strGetNumber = .Fields("Certificate")
I assume you have a table where you store the certificates after printing them?  

It should be a matter of doing SELECT MAX(CertNumber) FROM CertTable, then adding 1 to this number and inserting a new record into the table.

    frodoman is correct, also if you are keeping information for more than one type of certificate in your table, you can add the WHERE clause making it :

SELECT MAX(CertNumber) FROM CertTable WHERE CertType = "Computer Science"


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If you are using a table which contains your certificate details add an AutoNumber field to the record.  You can then use this field as it will always be unique. I expect you already have an autonumber field.  I would also add another field say called Printed.

' open your certificate records.

SQL = "Select * From [MyTable] Where ([Printed]=False);"
Set RS = DB.OpenRecordSet(SQL, dbOpenDynaset, DbSeeChanges)

' loop until all have been printed
Do While Not Rs.Eof

    'Print the cretificates
    PrintCert RS("MyAutoNumberField") ' call a sub to print the certificate
   ' PrintCert RS ' or you could pass the recordset to the subroutine.
   ' No mark the record as printed.
   RS("Printed") = True

Hope this helps~)
Those suggestions are correct.  If you are using a access data base you could use the primary key as an auto number and ensure that you keep a proper consecutice series of numbers with no jumps or duplicates.
mapyAuthor Commented:
Hi guys, help me out a little bit more.
I have done this:
Dim strCheck As String
Dim strGetNumber As String
Dim strCertificateNum As String
Dim rsMax As ADODB.Recordset
Set rsMax = New ADODB.Recordset
        strCheck = "SELECT MAX(Certificate) FROM Course_Registration"
        With rsMax
            .Open strCheck, cnConn, adOpenKeyset, adLockOptimistic
            If Not .EOF Then
                strGetNumber = .Fields("Certificate")
                strGetNumber = "SN001"
            End If
        End With
        Set rsMax = Nothing
        strGetNumber = Replace(strGetNumber, "SN", 0)
        strCertificateNum = "SN00" & (strGetNumber + 1)
        Text1.Text = strCertificateNum

and i'm getting an error message: 3265 "Item cannot be found in the collection corresponding to the requested name or ordinal." and it points to this line "strGetNumber = .Fields("Certificate")"
any suggestions.
thank you again.

The query is returning a single value, the highest number in the "Certificate" column. I beleave it would be named "MAX(Certificate)" or something similar. You can use AS to rename the column if you would like.
mapyAuthor Commented:
doesn't work dang123. i get the same error.

strGetNumber = .Fields(1)
You may also want to consider replacing this:

strCertificateNum = "SN00" & (strGetNumber + 1)

With this:

strCertificateNum = "SN" & right("000" & (strGetNumber + 1),4)

This way you won't have to change your code when you reach 100 and again when you reach 1000.
mapyAuthor Commented:
why you replace the field customer to 1? i tried and i still get the same error.
after you guys doing the qry: "select max(certificate) from table" how do you assign the biggest number to a variable? You have to open your table and assign it. how do you do it? Thanks a million for your help.
mapyAuthor Commented:
thank you Frudo for the extra codding correction of trimming. I'll use it. thank you!
mapyAuthor Commented:
it worked frodoman!!   I had to write: AS certificate.

Thank you all you guys for your help.
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