组合框中的值来源于表tblName;

组合框中输入新值后,可实现自动加入到可选项中.

Private Sub ComboName_LostFocus()
Dim rs As DAO.Recordset
Dim rs1 As DAO.Recordset
If Not IsNull(ComboName) or Trim(ComboName) <> "" Then     '这时防止添加空格

Set rs = CurrentDb.OpenRecordset("select * from tblNAME", , dbpressimistic)

Set rs1 = CurrentDb.OpenRecordset("select * from tblNAME where tblNAME.[字段名]='" & ComboName & "';", , dbpressmimstic)
If rs1.RecordCount = 0 Then   '防止重复添加

With rs
    .AddNew
    ![字段名] = Me.ComboName
    .Update
End With
End If
rs.Close
Set rs = Nothing
rs1.Close
Set rs1 = Nothing

Me.Requery
End If
End Sub