# Export track data live

Aim

To crease a sample interface that exports the track samples real-time, that is, during data acquisition.

Procedure

To enable external data export, you can write a DLL (COM DLL, also known as COM component) in C++. The DLL should implement the sample interface as follows:

Furthermore the DLL should include the instructions for processing the samples, for example:

▪Write the sample data to a local file;

▪Send the sample data over the network to an external application

If you need help with writing the code for your DLL, please contact Noldus.

Notes

▪The sample interface is specific to the EthoVision XT version you are using.