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| 20 | daniel-mar | 1 | |
| 2 |  |
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| 4 | Abstract |
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| 6 | ViaThinkSoft Currency Converter is a library developed by [Daniel Marschall](https://www.daniel-marschall.de/) which converts currencies. The latest exchange data is automatically downloaded and cached. |
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| 8 | To use ViaThinkSoft Currency Converter, you need an API key from [CurrencyLayer.com](https://www.currencylayer.com/). Keys with limited access are available for free, and there are paid subscriptions available, too. |
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| 10 | Usage for online applications, with PHP |
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| 12 | [Download framework and example script for PHP]https://github.com/danielmarschall/currency_converter/tree/master/PHP) |
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| 14 | [Try it now! Use the online tool](https://www.viathinksoft.com/info/currencyconverter/online_demo/) |
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| 16 | For Windows users |
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| 18 | If you are not a developer, you can download the ready-to-use demo EXE file. |
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| 20 | [Download Windows demo application, written in Delphi](https://www.viathinksoft.de/download.php?id=194) |
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| 22 |  |
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| 24 | For Windows developers |
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| 26 | The Currency Converter is implemented as a Windows DLL ([Source code for Delphi](https://github.com/danielmarschall/currency_converter/tree/master/DLL)), which can be used by most other programming languages as well as VBA (Visual Basic for Applications). Therefore, you can use Currency Calculator in Microsoft Office products. |
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| 28 | [Download compiled DLL for Win32 and Win64](https://www.viathinksoft.de/download.php?id=194) |
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| 29 | |||
| 30 | Download source code for usage in ... |
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| 32 | - [VBA (Microsoft Access, Excel etc.)](https://github.com/danielmarschall/currency_converter/tree/master/DLL%20Usage%20Demo/VBA) |
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| 34 | - [C++]https://github.com/danielmarschall/currency_converter/tree/master/DLL%20Usage%20Demo/C%2B%2B) |
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| 36 | - [Delphi](https://github.com/danielmarschall/currency_converter/tree/master/DLL%20Usage%20Demo/Delphi) |
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| 40 | Before using the DLL, please place the API key in your registry: |
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| 42 | |||
| 43 | Windows Registry Editor Version 5.00 |
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| 44 | |||
| 45 | [HKEY_CURRENT_USER\Software\ViaThinkSoft\CurrencyConverter] |
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| 46 | "APIKey"="....." |
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| 49 | [Specification of the exported DLL methods](https://htmlpreview.github.io/?https://raw.githubusercontent.com/danielmarschall/currency_converter/master/DLL%20Specification.html) |