动态修改IP方法

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//调用DhcpNotifyConfigChange函数动态修改IP

BOOL NotifyIPChange(LPCTSTR lpszAdapterName, int nIndex, LPCTSTR pIPAddress, LPCTSTR pNetMask)
{
 BOOL   bResult = FALSE;
 HINSTANCE  hDhcpDll;
 DHCPNOTIFYPROC pDhcpNotifyProc;
 WCHAR wcAdapterName[256];
 
 MultiByteToWideChar(CP_ACP, 0, lpszAdapterName, -1, wcAdapterName,256);

 if((hDhcpDll = LoadLibrary("dhcpcsvc")) == NULL)
  return FALSE;

 if((pDhcpNotifyProc = (DHCPNOTIFYPROC)GetProcAddress(hDhcpDll, "DhcpNotifyConfigChange")) != NULL)
  if((pDhcpNotifyProc)(NULL, 
                                     wcAdapterName, 
                                     TRUE, 
                                     nIndex, 
                                     inet_addr(pIPAddress), 
                                     inet_addr(pNetMask), 0) == ERROR_SUCCESS)
   bResult = TRUE;

 FreeLibrary(hDhcpDll);
 return bResult;
}