看示例二
http://www.foxtable.com/help/topics/0665.htm
参考代码
If LastInputTickCount Mod 30000 = 0 Then
Dim str As String = ""
For Each dt As DataTable In DataTables
Dim count As Integer = dt.DataRows.Count
dt.Load
If dt.DataRows.Count > count Then
str &= dt.Name & vbcrlf
End If
Next
msgbox(str)
End If