Checking Variable against table field (case sensitive)

[DC CS]

Good day all,
I want to check an input from the user against a field in my table. It must be an exact match, including capital letters. I am using the below code. It works perfectly, except that when the user inputs "adm!n" instead of "Adm!n", the code does not check that the first letter is a capital "A". It accepts both "adm!n" and "Adm!n" as correct, although the lower case "a" should fail the check.

    Private Sub ApproverCode_Exit(Cancel As Integer)    Dim dbs As DAO.Database
    Dim rs As DAO.Recordset
    Dim sql As String
    Dim approver1 As String
    Dim approverCode1 As String
    Dim isValid As Boolean
    
    approver1 = Me.Approver.Value
    approverCode1 = Me.ApproverCode.Value
    
    Set dbs = CurrentDb
    Set rs = dbs.OpenRecordset("SELECT AuthoriserCode FROM Tbl_AuthCodes WHERE AuthoriserID = '" & approver1 & "'", dbOpenSnapshot)
    
    isValid = False
    
    If Not rs.EOF Then
        rs.MoveFirst
        If rs!AuthoriserCode = approverCode1 Then
            isValid = True
        End If
    End If
    
    rs.Close
    Set rs = Nothing
    Set dbs = Nothing


    If Not isValid Then
        MsgBox "Approver code is incorrect. Please try again.", vbExclamation, "Invalid Code"
        Me.approverCode.SetFocus
    End If
End Sub

Any suggestions how I can achieve this?



Thanks

[CJ_London]

Access is not case sensitive - use the strcomp function with the parameters set to view binary. On my phone but you can Google strcomp to find out more

[DC CS]

Thanks CJ_London - This resolved the issue.