For example C code that shows how to control the jrk using its serial interface in Microsoft Windows, download JrkSerialCWindows.zip (4k zip). This zip archive contains a Microsoft Visual C++ 2010 Express project that shows how to send a Set Target command and also a Get Position command. It can also be compiled with MinGW. The jrk’s input mode needs to be set to “Serial” and the serial mode needs to be set to “USB Dual Port” for this code to work. This example is like the previous example except it does the serial communication using Windows-specific functions like CreateFile and WriteFile. See the comments in the source code for more details.