怎么通过程序控制网络连接的禁用和启用

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1、怎么通过程序控制网络连接的禁用和启用/    还是帖出来吧, 我可是花了三天时间才搞定了.    /    #include   #include     //  cfgmgr32.h 在Microsoft Windows 2000 DDK 中.                           //  要用 CM_Get_DevNode_Status(...) 来查询状态.  //---------------------------------------------------------------------------  ty

2、pedef struct NetCardStruct  {      DWORD Id;           // 网卡设备号      AnsiString Name;    // 网卡名      bool Disabled;      // 当前是否禁用      bool Changed;       // 是否更改过  } TNetCardStruct;  typedef TNetCardStruct PNetCardStruct;  //----------------------------------------------------------------------

3、-----  //   EnumNetCards 枚举出网卡  //---------------------------------------------------------------------------  void __fastcall EnumNetCards(TList NetDeviceList)  {      AnsiString DevValue;      PNetCardStruct NetCard;      DWORD Status, Problem;      LPTSTR Buffer = NULL;      DWORD BufSize = 0;

4、      HDEVINFO hDevInfo = 0;  if (INVALID_HANDLE_VALUE == (hDevInfo =                  SetupDiGetClassDevs(NULL,NULL,0,DIGCF_PRESENTDIGCF_ALLCLASSES)))          return;      SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};  HKEY hKeyClass;  char DeviceName[200];  for (DWORD DeviceId=0;

5、              SetupDiEnumDeviceInfo(hDevInfo,DeviceId,&DeviceInfoData); DeviceId++)      {          if (CM_Get_DevNode_Status(&Status, &Problem,                      DeviceInfoData.DevInst,0) != CR_SUCCESS)             continue;            DevValue.SetLength(0);          if (GetRegistryProperty(h

6、DevInfo, &DeviceInfoData, SPDRP_CLASS , &Buffer, (PULONG)&BufSize))              DevValue = Buffer;          if (DevValue == "Net")          {              DevValue.SetLength(0);              if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_ENUMERATOR_NAME , &Buffer, (PULONG)&BufSize))   

7、               DevValue = Buffer;              if (DevValue != "ROOT")              {                  NetCard = new TNetCardStruct;                  NetCard->Id = DeviceId;                  NetCard->Name = "