Linker error

[hoitjuh55]

Hallo,
Ik wil een HTTP request-library maken, maar ik stuit op het volgende probleem:
als ik de code probeer te runnen, geeft de linker de volgende error:

[ILINK32 Error] Error: Unresolved external 'HttpPost(System::UnicodeString, System::UnicodeString)' referenced from D:\CPP PROJECTS\JIANCE TOOLS\DEBUG\UPLOADMAIN.OBJ

Mijn code is:
HttpRequest.h:

//---------------------------------------------------------------------------
#ifndef HttpRequestLib
#define HttpRequestLib
//---------------------------------------------------------------------------
#include <Classes.hpp>
#include <WinSock2.h>
//---------------------------------------------------------------------------
extern UnicodeString HttpPost(UnicodeString Host, UnicodeString Data);
//---------------------------------------------------------------------------
#endif

HttpRequest.cpp:

//---------------------------------------------------------------------------
#pragma hdrstop
#include "HttpRequest.h"
#pragma package(smart_init)
#pragma comment(lib, "winsock.lib")
//---------------------------------------------------------------------------
UnicodeString HttpPost(UnicodeString Host, UnicodeString Data)
{
  // Init
  WSAData wsaData;
  if (WSAStartup(WINSOCK_VERSION,&wsaData))
	return "WSA Startup Failed!";

  // Make socket
  SOCKET ASocket = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
  if (ASocket == INVALID_SOCKET)
	return "Creating Socket Failed!";

  // Fill socket
  LPHOSTENT HostEntry = gethostbyname(Host.c_str());
  SOCKADDR_IN AServer;
  AServer.sin_family = AF_INET;
  AServer.sin_addr = *((LPIN_ADDR)*HostEntry->h_addr_list);
  AServer.sin_port = htons(80);

  // Connect the socket
  if (connect(ASocket,(LPSOCKADDR)&AServer,sizeof(struct sockaddr)) == SOCKET_ERROR)
	return "Connecting Socket Failed!";

  // Fill HTTP request

  // Send HTTP request

  // Cleanup
  closesocket(ASocket);
  WSACleanup();

  return "Success!";
}
//---------------------------------------------------------------------------

Weet iemand misschien hoe ik dit kan oplossen? Ik gebruik CodeGear C++ Builder 2009 en verder gebruik ik geen externe libs, alleen WinSock.

 

[cx1213]

Je moet extern weghalen.