Pinvoke /从C＃调用本机Windows API函数

from within my C#-application I use functions of an external DLL. This DLL itself uses network functions. So it is necessary to initialise Winsock out of my C#-application to let the network sockets work for this DLL. That's how I try to execute WSAStartup for initialisation, but it does not seem to work:from within my C#-application I use functions o