Identify a 3-column PK duplicate in VBA Access

Question

I cannot seem to figure out the best way to identify whether my record table already has the unique 3-column combination of the data using VBA.

My table is as follow

Answer 1

I found 2 general ways of handling this. (1) would include error handling - which I find to be a bad practise. (2) would include DCount function to find the row of data first, then an if condition to determine whether UPDATE or INSERT should be used.

Hence I used (2) as follows:

If DCount("*", "sometable", "[col1]= " & Me.col1.value & " AND [col2] = " & Me.col2.value & " AND [col3] = " & Me.col3.value) = 0 Then
    CurrentDB.Execute "INSERT ..."
Else
    CurrentDB.Execute "UPDATE ..."
End If

The (1) solution would be something like:

On Error Resume Next
CurrentDb.Execute "INSERT ...", dbFailOnError
If Err.Number = 3022 Then
    Err.Clear        
    CurrentDb.Execute "UPDATE ...", dbFailOnError
End If