程序代码：

请教一个问题啊！！我搞了好长时间了!!
Private Sub Command1_Click()
Dim con As New ADODB.Connection
Dim rs As New ADODB.Recordset
con.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\db\tybm.mdb;Persist Security Info=False"
rs.CursorLocation = adUseClient
rs.Open ("select * from tyks order by cdbl(kh)"), con, adOpenDynamic, adLockBatchOptimistic

 
①con.Execute ("UPDATE tyks SET df = dMAX('cj1','pfb','tycj8 <=' & tyks.cj &'and xbdm='' & tyks.xb&''') Where bkdm = '8'")

 
②con.Execute ("UPDATE tyks SET df = (select max(cj1) from pfb where tycj8 <=tyks.cj and xbdm= tyks.xb)  Where bkdm = '8'")

 
Set DataGrid1.DataSource = rs
End Sub
用第一句，提示DMAX没有定义，
用第二句，操作必须使用一个可更新的查询
如何更改，才能实现上述功能！[表情]