Question : Checking for duplicate record AfterLostFocus

I have a Jobs table (tblJobs) that has 3 fields I need to manipulate. On data entry of a new job (I have a command button to "Add" a new job) I need the following to happen as the user enters the data:
1. Enter Job Number (JobNumber)...Sample: 0035 (text)
2. Enter the Year (JobYear)...Sample: 2010 (text)
3. When losing focus on the Year, I want to combine the two fields into one (JobNumberExt)...Sample 00352010 (text)
4. I want the code to check tblJobs to see if that JobNumber already exists.
5. If so, display a warning msg and set focus to the JobNumber field for modification..
6. If not, set focus to next field (JobName)
Reasoning to help clarify situation...every year the JobNumber starts at 0001. Therefore I have to enter the JobYear and combine the two fields to eliminate duplicate jobs.

Answer : Checking for duplicate record AfterLostFocus

private sub jobYear_lostfocus()

if dcount("*","tbljobs","jobnumber='" & me.jobNumber &"' and jobyear='"  & me.jobYear & "'")>0 then
msgbox "record already exists"
me.jobnumber.setfocus
end if

end sub