修改密码的代码　
这个好像不难我也写了但是就是没用
所以来这里请教高手。我的运行环境是Microsoft Visual Studio .NET 2003
我的如下：
  Dim tablename As String
        tablename = "userid"
        searchSQL = "select * from userid where (用户名='" & TextBox1.Text & "')"
        Try
            ExecuteSQL(searchSQL, tablename)
            If myrow.Item(1) = TextBox2.Text Then
                myrow.Item(1) = TextBox3.Text
                mytable.GetChanges()
                cmd = New OleDbCommandBuilder(ADOcmd)
                ADOcmd.Update(ds, tablename)
                MsgBox("密码修改成功！", vbOKOnly + vbExclamation, "警告")
                Me.Hide()
            Else
                Exit Sub
　　　　　　　End If
        Catch
            MsgBox("没有该用户！", vbOKOnly + vbExclamation, "警告")
　　　　　　　　End Try
请高手指点。谢谢！！