程序很简单的，就两个文件。把dll.cpp编译成dll，然后在exe.cpp中调用。哪位帮忙编译
运行一下看看是不是也出错？先谢过啦！

源代码"exe.cpp"
__declspec(dllimport) void NullFun();
#pragma comment(lib,"dll.lib")
void main(){NullFun();}

源代码"dll.cpp"
#include <windows.h>
#include <stdio.h>
#include <winsock.h>
#pragma comment(lib,"wsock32.lib")

SOCKET sServer=NULL;
BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved)
{
  WSADATA ws;
  switch (ul_reason_for_call)
  {
  case DLL_PROCESS_ATTACH:
    WSAStartup(0x0101,&ws);
    sServer=socket(AF_INET,SOCK_STREAM,0);
    break;
  case DLL_PROCESS_DETACH:
    if(closesocket(sServer)!=0) printf("Error:%d\n",WSAGetLastError());
    else printf("Success!");
    WSACleanup();
    break;
  case DLL_THREAD_ATTACH:
  case DLL_THREAD_DETACH:
    break;
  }
  return TRUE;
}
__declspec(dllexport) void NullFun(){}

没人回，自己顶一下。
DLL_RPOCESS_ATTACH 时生成的socket， 在DLL_PROCESS_DETACH 时却无法使用。