次のコードを考えると、誰かが助けてくれれば、なぜこのエラーが発生するのか理解できないようです。
コード：
#include "StdAfx.h"
#include "WINDOWS.H"
#include "Dhcpcsdk.h"
//#include "Dhcpcsvc.dll"
#include <iostream>
using namespace std;
#define NUMBER_OF_OPTIONS 7
//#define NUMBER_OF_OPTIONS 4
enum OptionArrayPositions
{
MASK,
DNS,
HOSTNAME,
VENDOR,
LEASE_TIME,
MESSAGE_TYPE,
SERVERIP
};
BOOL RetrieveDHCPInfo(LPWSTR pszAdapterName);
void PrintAsAscii(DHCPCAPI_PARAMS param);
void PrintAsIP(DHCPCAPI_PARAMS param);
void PrintAsInt(DHCPCAPI_PARAMS param);
void PrintMask(DHCPCAPI_PARAMS param);
void PrintDNS(DHCPCAPI_PARAMS param);
void PrintHostName(DHCPCAPI_PARAMS param);
void PrintVendor(DHCPCAPI_PARAMS param);
void PrintLeaseTime(DHCPCAPI_PARAMS param);
void PrintMessageType(DHCPCAPI_PARAMS param);
void PrintServerIP(DHCPCAPI_PARAMS param);
BOOL RetrieveDHCPInfo(LPWSTR pszAdapterName)
{
DWORD dwError, dwSize;
CHAR TmpBuffer[1000]; // host name won't be larger than this
DHCPCAPI_PARAMS DhcpApiMaskParams = {0,
OPTION_SUBNET_MASK,
FALSE,
NULL,
0
};
DHCPCAPI_PARAMS DhcpApiDNSParams = {0,
OPTION_DOMAIN_NAME_SERVERS,
FALSE,
NULL,
0
};
DHCPCAPI_PARAMS DhcpApiHostNameParams = {0, // Flags
OPTION_HOST_NAME, // OptionId
FALSE, // vendor specific?
NULL, // data filled in on return
0 // nBytes
};
DHCPCAPI_PARAMS DhcpApiVendorParams = {0,
OPTION_VENDOR_SPEC_INFO,
FALSE,
NULL,
0
};
DHCPCAPI_PARAMS DhcpApiLeaseTimeParams = {0,
OPTION_LEASE_TIME,
FALSE,
NULL,
0
};
DHCPCAPI_PARAMS DhcpApiMsgTypeParams = {0,
OPTION_MESSAGE_TYPE,
FALSE,
NULL,
0
};
DHCPCAPI_PARAMS DhcpApiServerNameParams = {0,
OPTION_SERVER_IDENTIFIER,
FALSE,
NULL,
0
};
DHCPCAPI_PARAMS paramArray[NUMBER_OF_OPTIONS] = { DhcpApiMaskParams,
DhcpApiDNSParams,
DhcpApiHostNameParams,
DhcpApiVendorParams,
DhcpApiLeaseTimeParams,
DhcpApiMsgTypeParams,
DhcpApiServerNameParams
};
DHCPCAPI_PARAMS_ARRAY DhcpApiParamsArray = {NUMBER_OF_OPTIONS, // only one option to request
paramArray
};
DHCPCAPI_PARAMS_ARRAY SendParams = {0, NULL};
dwSize = sizeof(TmpBuffer);
dwError = DhcpRequestParams(DHCPCAPI_REQUEST_SYNCHRONOUS, // Flags
NULL, // Reserved
pszAdapterName, // Adapter Name
NULL, // not using class id
SendParams, // nothing to send
DhcpApiParamsArray, // requesting params
(PBYTE) TmpBuffer, // buffer
&dwSize, // buffer size
NULL // Request ID
);
cout << "Your Error Code from DhcpRequestParams is " << dwError << endl;
if( ERROR_MORE_DATA == dwError )
{
//
// dwSize is not large enough.
//
}
int success = FALSE;
if( NO_ERROR == dwError )
{
for(int i=0; i<NUMBER_OF_OPTIONS; i++)
{
if(paramArray[i].nBytesData != 0)
{
success = true;
switch(paramArray[i].OptionId)
{
case OPTION_SUBNET_MASK:
PrintMask(paramArray[i]);
break;
case OPTION_DOMAIN_NAME_SERVERS:
PrintDNS(paramArray[i]);
break;
case OPTION_HOST_NAME:
PrintHostName(paramArray[i]);
break;
case OPTION_VENDOR_SPEC_INFO:
PrintVendor(paramArray[i]);
break;
case OPTION_LEASE_TIME:
PrintLeaseTime(paramArray[i]);
break;
case OPTION_MESSAGE_TYPE:
PrintMessageType(paramArray[i]);
break;
case OPTION_SERVER_IDENTIFIER:
PrintServerIP(paramArray[i]);
break;
}
}
}
cout << endl;
}
if(success == TRUE)
return TRUE;
else
return FALSE;
}
void PrintAsAscii(DHCPCAPI_PARAMS param)
{
unsigned char temp[260];
CopyMemory(temp,
param.Data,
param.nBytesData);
temp[param.nBytesData] = '\0';
cout << temp;
}
void PrintAsIP(DHCPCAPI_PARAMS param)
{
unsigned char temp[260];
CopyMemory(temp,
param.Data,
param.nBytesData);
temp[param.nBytesData] = '\0';
for(unsigned int i=0; i<param.nBytesData; i++)
{
if(i%4 == 0)
{
cout << endl;
}
cout << (int)temp[i]<< ".";
}
}
void PrintAsInt(DHCPCAPI_PARAMS param)
{
unsigned char temp[260];
CopyMemory(temp,
param.Data,
param.nBytesData);
temp[param.nBytesData] = '\0';
cout << (unsigned int)*temp;
}
void PrintMask(DHCPCAPI_PARAMS param)
{
/* Print the subnet mask
* This is stored as Option 1
*
*
*/
cout << endl << "MASK" << endl;
cout << "--------------------------------------------";
PrintAsIP(param);
}
void PrintDNS(DHCPCAPI_PARAMS param)
{
/* Print the DNS Servers
* This is stored as Option 6
*
*
*/
cout << endl << "\nDNS SERVERS" << endl;
cout << "--------------------------------------------";
PrintAsIP(param);
}
void PrintHostName(DHCPCAPI_PARAMS param)
{
/* Print the Host name or IP address if
* that's what's stored in this option
* This is stored as Option 12
*
*/
cout << endl << "\nHOST NAME" << endl;
cout << "--------------------------------------------";
cout << endl << "ANSI String" << endl;
PrintAsAscii(param);
cout << endl << "IP FORMAT";
PrintAsIP(param);
}
void PrintVendor(DHCPCAPI_PARAMS param)
{
/* Print the Vendor parameter
* This is stored as Option 43
*
*
*/
cout << endl << "\nVENDOR PARAMETER" << endl;
cout << "--------------------------------------------";
cout << endl << "ANSI String" << endl;
PrintAsAscii(param);
}
void PrintLeaseTime(DHCPCAPI_PARAMS param)
{
/* Print the Lease Time
* This is stored as Option 51
*
*
*/
cout << endl << "\nLEASE TIME" << endl;
cout << "--------------------------------------------" << endl;
PrintAsInt(param);
cout << endl;
}
void PrintMessageType(DHCPCAPI_PARAMS param)
{
/* Print the message type
* This is stored as Option 53
*
*
*/
cout << endl << "\nMESSAGE TYPE" << endl;
cout << "--------------------------------------------" << endl;;
PrintAsInt(param);
}
void PrintServerIP(DHCPCAPI_PARAMS param)
{
/* Print the DHCP servers IP address
* This is stored as Option 54
*
*
*/
cout << endl << "\nDHCP SERVER" << endl;
cout << "--------------------------------------------";
PrintAsIP(param);
}
int main(){
struct DHCPAPI_PARAMS {
ULONG Flags;
ULONG OptionId;
BOOL IsVendor;
LPBYTE Data;
DWORD nBytesData;
};
DHCPCAPI_PARAMS DhcpApiMaskParams = {0,
OPTION_SUBNET_MASK,
FALSE,
NULL,
0
};
char name[26];
cout<<"Hello World"<< endl;
cin>>name;
PrintAsIP(DhcpApiMaskParams);
return 0;
}
これは、これを実行したときに受け取るエラー コードです。明らかに、hello world と enter cin name は、初心者向けです。
これが私が受け取るエラーです。
エラー:
エラー 1 エラー LNK2019: 関数 "int __cdecl RetrieveDHCPInfo(wchar_t *)" で参照されている未解決の外部シンボル _DhcpRequestParams@44 (?RetrieveDHCPInfo@@YAHPA_W@Z)
エラー 2 エラー LNK1120: 1 つの未解決の外部