Why is there Sleep() in rtl_fm?

Is this from Windows or something?  In unix it's sleep, not Sleep, and it only takes ints or something similar. I have a native (OpenBSD) usleep so I ifdefed: #ifdef _WIN32 #define usleep(x) Sleep(x/1000) #endif It didn't affect my problem but it made me feel better.   Alan   ----- Radio Astronomy - the ultimate DX