Hi, can anyone assist me with loading DLL files for Win32, pthread.h?

Here is my error:
C:\C Files>lcclnk proxy1.obj -map pthreadGC2.dll -map pthreadVC2.dll -map pthreadGCE2.dll -map threadVSE2.dll -entry receiveBrowserRequests
Error c:\c files\proxy1.c 195 undefined reference to __imp__pthread_create
Thanks