How to open a new page from datagridbutton

I have a datagrid button column where I take care of its event by using the ItemCommand event. When the event triggers I want to open a new webpage and send along some parameters, like:

VB Code:

Private Sub OnDataGridCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles dgPlanned.ItemCommand, results2.ItemCommand
        If e.CommandName.ToString = "Info" Then
            Response.Redirect("Info.aspx?ID=" & e.Item.Cells(0).Text)
        End If
    End Sub

How can I modify this code so I can open a small window as a new?

kind regards
Henrik

I don't think it can be done without using a Javascript or VBScript client-side script.