You could select it ahead of time.  Typically I create a dropdownlist in the module settings, bind it to the TabController and save it as a setting.

ddlSuccessPage.DataSource = TabController.GetPortalTabs(this.PortalId, -1, true, Localization.GetString("DefaultSuccessPagesListItem.Text", this.LocalResourceFile), true, false, false, true, true);

ddlSuccessPage.DataValueField = "TabID";
ddlSuccessPage.DataTextField = "IndentedTabName";
ddlSuccessPage.DataBind();

if (Settings["SuccessPage"] != null)
{
  ddlSuccessPage.SelectedValue = Settings["SuccessPage"].ToString();
}

PS - As Sebastian mentioned you get "see" the tabid in the url when editing the page you can get the current tabid programmatically using this.TabId

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Steven Webster
Manager, Community Platform
F5 Networks, DevCentral

"PS - As Sebastian mentioned you get "see" the tabid in the url when editing the page you can get the current tabid programmatically using this.TabId"

I cringe at the idea of hard coding tabid's obtained while in the page edit UI, There must be a way to access the pages structure? seems really simple to just run a linq expression on that page structure and get the node your looking for.

Some of us are new to the DNN and there are not whole allot resources available on the internet about DNN as compare to the other CMS systems. I noticed this form is not that helpful as most of the folks assume that everyone know everything. So please elaborate a little bit with some details or reference somewhere where we can find some good help instead of figuring out what exactly your answers mean on top of the our issue in hand. Thanks.