---
title: "Handle Dynamic Currency Conversion"
url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/com-extension-for-windows-integration/extras-com-extension/handle-dynamic-currency-conversion-com-extension"
source_url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/com-extension-for-windows-integration/extras-com-extension/handle-dynamic-currency-conversion-com-extension.md"
canonical: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/com-extension-for-windows-integration/extras-com-extension/handle-dynamic-currency-conversion-com-extension"
last_modified: "2026-05-23T12:56:20+02:00"
language: "en"
---

# Handle Dynamic Currency Conversion

[View source](/point-of-sale/classic-library-deprecation/classic-library-integrations/com-extension-for-windows-integration/extras-com-extension/handle-dynamic-currency-conversion-com-extension.md)

## Callback

| Name                   | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| ---------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `TenderAdditionalData` | The callback is tender-based and thus has both a PED object as well as a Tender object as parameters. The header contains the DCC related information accessible via [the standard mechanism](/point-of-sale/classic-library-deprecation/classic-library-integrations/com-extension-for-windows-integration/key-steps-com-extension/process-a-basic-transaction-com-extension/handle-and-extract-data-from-callbacks-com-extension). This is a progress style event because it requires no cash register action. In this case, the cardholder is uncertain what to do the staff is aware of the options/choice the cardholder is facing. |

## Parameters

| Name        | Type                                                                                                                                                                   | Description                                                                                             |
| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- |
| `pedObj`    | [PedDevice](/point-of-sale/classic-library-deprecation/classic-library-integrations/com-extension-for-windows-integration/com-extension-for-windows-objects/peddevice) | PED object that represents the terminal.                                                                |
| `tenderObj` | [Tender](/point-of-sale/classic-library-deprecation/classic-library-integrations/com-extension-for-windows-integration/com-extension-for-windows-objects/tender)       | The tender associated with the additional data.                                                         |
| `headerObj` | ResponseHdr                                                                                                                                                            | Header object that includes generic statuses, information about merchant, additional data from the PED. |

## DCC Returned Details

The DCC details extracted using [the standard mechanism](/point-of-sale/classic-library-deprecation/classic-library-integrations/com-extension-for-windows-integration/key-steps-com-extension/process-a-basic-transaction-com-extension/handle-and-extract-data-from-callbacks-com-extension)contain the following keys (values provided below are examples):

| **additionalDataKey**         | **additionalDataValue** |
| ----------------------------- | ----------------------- |
| dcc.markup                    | 300                     |
| dcc.commissionfee             | 0                       |
| dcc.exchangerate              | 11180                   |
| dcc.converted.amount.value    | 1677                    |
| dcc.converted.amount.currency | USD                     |
| dcc.org.amount.value          | 1500                    |
| dcc.org.amount.currency       | EUR                     |
| dcc.source                    | FX\_exchange\_rate      |

## DCC Progress events

* ASK\_DCC
* DCC\_ACCEPTED / DCC\_REJECTED