关于DHCP api调用的问题

Question

我想对DHCP服务在本地进行简单的监控，获取相关的IP地址分配信息等。 

查了MSDN 提供相关的api。如：dhcpget***，dhcpenum**

于是看了说明了写了如下简单的程序，简单试试。

运行环境，是在虚拟机中建了2003，开启了DHCP服务。（IP 为192.168.50.254）.
我的代码如下：

#include "stdafx.h"
#include <Windows.h>
#include "dhcpcsdk.h"
#include "dhcpsapi.h"
#include <iostream>
using namespace std;
void OutputError(DWORD dwError)
{
    LPVOID lpMsgBuf;    // buffer to copy string into (allocated by call)
    if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM | 
        FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwError,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
        (LPTSTR) &lpMsgBuf, 0, NULL) == 0)
        printf("Error Reported: %d GetLastError: %d\n", dwError, GetLastError());
    else  
    {
        printf("Error %d: %s\n", dwError, (LPCSTR) lpMsgBuf);  
        // free the buffer.
        LocalFree(lpMsgBuf);
    }
}
int main(void)
{
    DWORD dwRsult;
    DWORD dwVersion;
    DWORD errorcode;
    dwRsult = DhcpCApiInitialize( &dwVersion );
    if ( dwRsult != 0 )
    {
       OutputError(dwRsult );
        return 0;
    }
     printf("DHCP Client Options API version %d\n", dwVersion);
    char ips[] = {"192.168.50.254"};
    WCHAR wips[40] ;
    MultiByteToWideChar(0, 0, ips, strlen(ips), wips, 40);
    LPDHCP_BIND_ELEMENT_ARRAY myarr;
    errorcode = DhcpGetServerBindingInfo(wips,   DHCP_ENDPOINT_FLAG_CANT_MODIFY, &myarr);
    if (errorcode == 0)
    {
        printf(" DhcpGetServerBindingInfo() is ok\n");
    } 
    else
    {
        OutputError(errorcode);
    }
    DhcpCApiCleanup();
    getchar();
}

可为什么运行结果如下：

DHCP Client Options API version is 2

Error 1722: RPC 服务器不可用。

 

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