Private Sub Form_Unload(Cancel As Integer)
  Screen.MousePointer = vbDefault
End Sub

Private Sub datPrimaryRS_Error(ByVal ErrorNumber As Long, Description As String, ByVal Scode As Long, ByVal Source As String, ByVal HelpFile As String, ByVal HelpContext As Long, fCancelDisplay As Boolean)
  '错误处理程序代码置于此处
  '想要忽略错误，注释掉下一行
  '想要捕获它们，在此添加代码以处理它们
  MsgBox "Data error event hit err:" & Description
End Sub

Private Sub datPrimaryRS_MoveComplete(ByVal adReason As ADODB.EventReasonEnum, ByVal pError As ADODB.Error, adStatus As ADODB.EventStatusEnum, ByVal pRecordset As ADODB.Recordset)
  '为这个 recordset 显示当前记录位置
  datPrimaryRS.Caption = "Record: " & CStr(datPrimaryRS.Recordset.AbsolutePosition)
End Sub

Private Sub datPrimaryRS_WillChangeRecord(ByVal adReason As ADODB.EventReasonEnum, ByVal cRecords As Long, adStatus As ADODB.EventStatusEnum, ByVal pRecordset As ADODB.Recordset)
  '验证代码置于此处
  '下列动作发生时该事件被调用
  Dim bCancel As Boolean

  Select Case adReason
  Case adRsnAddNew
  Case adRsnClose
  Case adRsnDelete
  Case adRsnFirstChange
  Case adRsnMove
  Case adRsnRequery
  Case adRsnResynch
  Case adRsnUndoAddNew
  Case adRsnUndoDelete
  Case adRsnUndoUpdate
  Case adRsnUpdate
  End Select

  If bCancel Then adStatus = adStatusCancel
End Sub

Private Sub cmdAdd_Click()
  On Error GoTo AddErr
  datPrimaryRS.Recordset.AddNew

  Exit Sub
AddErr:
  MsgBox Err.Description
End Sub

Private Sub cmdDelete_Click()
  On Error GoTo DeleteErr
  With datPrimaryRS.Recordset
    .Delete
    .MoveNext
    If .EOF Then .MoveLast
  End With
  Exit Sub
DeleteErr:
  MsgBox Err.Description
End Sub

Private Sub cmdRefresh_Click()
  '只有多用户应用程序需要
  On Error GoTo RefreshErr
  datPrimaryRS.Refresh
  Exit Sub
RefreshErr:
  MsgBox Err.Description
End Sub

Private Sub cmdUpdate_Click()
  On Error GoTo UpdateErr

  datPrimaryRS.Recordset.UpdateBatch adAffectAll
  Exit Sub
UpdateErr:
  MsgBox Err.Description
End Sub

Private Sub cmdClose_Click()
  Unload Me
End Sub

以上是代码，我另外增加一个combo list 和 命令按钮实现 查询某个字段如班线中一项就可以显示整个记录，但不知道如何写代码
我是菜鸟中的菜鸟 希望大侠们可以详细点

大虾们能帮帮忙吗？