> This page is for TWS API.

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# TWS API File Location & Tools

Notable files:

* **%TWSAPI%\API_VersionNum.txt :** You can check your API version in this file.
* **%TWSAPI%\samples\CSharp\IBSampleApp\bin\Release\IBSampleApp.exe :** You can manually use the IBSampleApp to test the API functions.
* **%TWSAPI%\samples\Java\ApiDemo.jar :** This is built with Java. Java users can use it to quickly test the IB TWS API functions.