public static string BonusReceipt() { string check = AdditionalFunc.StringFromNativeUtf8(Cbposlib.getReceiptHeaderPtr()); check = check + AdditionalFunc.StringFromNativeUtf8(Cbposlib.getReceiptBodyPtr()); check = check + AdditionalFunc.StringFromNativeUtf8(Cbposlib.getReceiptFooterPtr()); return(check); }