Sorted my head out...
script runat="server"
public static UCFunctions.CombinedProduct combinedProduct = new UCFunctions.CombinedProduct();
protected override void OnInit(EventArgs e) {
string partNumber = Eval("PartNumber",true).ToString();
combinedProduct = UCFunctions.GetCombinedProduct(partNumber,1,true,true,true);
}
/script
:)