Setup Radwindow on button in code behind

int tempId= 168;
RadWindow rw = rwmTEMP.Windows[0];
rw.Width = System.Web.UI.WebControls.Unit.Pixel(1000);
rw.Height = System.Web.UI.WebControls.Unit.Pixel(1000);
rw.Behaviors = WindowBehaviors.Move | WindowBehaviors.Close | WindowBehaviors.Maximize | WindowBehaviors.Resize;
rw.OpenerElementID = btnOpenWindow.ClientID;

rw.NavigateUrl = "~/xxxxx/abccc.aspx?TempId=" + tempId.ToString();