Link Button in Datagrid

I am developing a web app using VB.NET , VS 2003 and SQL 2000 DB.

Currenlty  I am playing with datagrid. My datagrid gets populated with data from SQL DB and that works fine.

For necessary requirements, I had to add some link buttons columns to my datagrid, so each row of the datagrid has same link buttons.

When user clicks on a link button(s), my code gets the ID of that specific row and opens a new window and transfers value of that ID to be used as reference in the new window.
One of the soubroutine's code for this is:

Public Sub DEDR_LockInfo(ByVal Sender As Object, ByVal E As DataGridCommandEventArgs)
       
        'RETRIVE LoanID for a specific row
        Dim lblLoanID As Label = E.Item.FindControl("lblLoanID")
        Dim LoanID As Integer = CType(lblLoanID.Text, Integer)

        Server.Transfer("BrokerLockInfo.aspx?&trans_id=" + LoanID.ToString(), True)
    End Sub

So, this also works fine, considering that I am using following syntax in HTML view of datagrid

<asp:TemplateColumn HeaderText="Lock Info">
     <ItemTemplate>
        <asp:LinkButton id="linkbtnLock" Text="Lock Info" Runat="server"  CommandName="Edit">
        </asp:LinkButton>
    </ItemTemplate>
</asp:TemplateColumn>

and then in datagrid definition I specificy that
onEditCommand="DEDR_LockInfo"  will be run.

So, as you can see my link button is set to invoke built in Edit command function of the datagrid and then datagrid knows that when Edit is processed it will actually process DEDR_LockInfo subroutine.

This works fine. I have 3 other link buttons so I used up all other Datagrid's On.....Commands such as
onUpdateCommand, OnDeleteCommand, OnCancelCommand.

Now I have a need for 1 more Link Button to be added to datagrid with the same purpose as all others, but I do not know how to set that new link button to run for example the above same DEDR_LockInfo subroutine.

So, what I can use to force my new linkbutton that is inside the grid, to run a specific subroutine that is gathering ID of that specific row and passes it to the new window?
It must be able to handle
ByVal E As DataGridCommandEventArgs
becasue of
E.Item.FindControl("lblLoanID")  accessing.

Thank you in advance