如何禁用网卡

[winter_leaf_wei]

如何在w2k和98下编程禁用网卡哪？！！

[netsys2]

本文来自FAQ

Q : 如何编程控制网络连接（自动禁用和启用）？
主要解答者: sczyq 提交人: warton
感谢: sczyq
审核者: ccrun 论坛对应贴子: 查看
A :

如何编程控制网络连接？就是win2000下右下角的网络连接标志（一闪一闪的），本来可以手动禁用和手工启动的，不知道能不能编程来控制它的禁用和启用？非常感谢！高分赠送！
---------------------------------------------------------------

/*

还是帖出来吧, 我可是花了三天时间才搞定了.

*/

#include <SetupAPI.h>
#include <cfgmgr32.h> // cfgmgr32.h 在Microsoft Windows 2000 DDK 中.
// 要用 CM_Get_DevNode_Status(...) 来查询状态.
//---------------------------------------------------------------------------
typedef 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;
//---------------------------------------------------------------------------
// EnumNetCards 枚举出网卡
//---------------------------------------------------------------------------
void __fastcall EnumNetCards(TList *NetDeviceList)
{
AnsiString DevValue;
PNetCardStruct NetCard;
DWORD Status, Problem;
LPTSTR Buffer = NULL;
DWORD BufSize = 0;
HDEVINFO hDevInfo = 0;
if (INVALID_HANDLE_VALUE == (hDevInfo =
SetupDiGetClassDevs(NULL,NULL,0,DIGCF_PRESENT ¦DIGCF_ALLCLASSES)))
return;
SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};
HKEY hKeyClass;
char DeviceName[200];
for (DWORD DeviceId=0;
SetupDiEnumDeviceInfo(hDevInfo,DeviceId,&DeviceInfoData); DeviceId++)
{
if (CM_Get_DevNode_Status(&Status, &Problem,
DeviceInfoData.DevInst,0) != CR_SUCCESS)
continue;

DevValue.SetLength(0);
if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_CLASS , &Buffer, (PULONG)&BufSize))
DevValue = Buffer;
if (DevValue == "Net")
{
DevValue.SetLength(0);
if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_ENUMERATOR_NAME , &Buffer, (PULONG)&BufSize))
DevValue = Buffer;
if (DevValue != "ROOT")
{
NetCard = new TNetCardStruct;
NetCard->Id = DeviceId;
NetCard->Name = "<Unknown Device>";
if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_DRIVER , &Buffer, (PULONG)&BufSize))
if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_DEVICEDESC , &Buffer, (PULONG)&BufSize))
NetCard->Name = Buffer;
NetCard->Disabled = (Status & DN_HAS_PROBLEM) && (CM_PROB_DISABLED == Problem);
NetCard->Changed = false;
NetDeviceList->Add(NetCard);
}
}
}
}
//---------------------------------------------------------------------------
bool __fastcall GetRegistryProperty(HDEVINFO DeviceInfoSet,
PSP_DEVINFO_DATA DeviceInfoData, ULONG Property, PVOID Buffer, PULONG Length)
{
while (!SetupDiGetDeviceRegistryProperty(DeviceInfoSet,
DeviceInfoData, Property, NULL, (BYTE *)*(TCHAR **)Buffer, *Length, Length))
{
if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
{
if (*(LPTSTR *)Buffer) LocalFree(*(LPTSTR *)Buffer);
*(LPTSTR *)Buffer = (PCHAR)LocalAlloc(LPTR,*Length);
}
else return false;
}
return (*(LPTSTR *)Buffer)[0];
}
//---------------------------------------------------------------------------
// NetCardStateChange 网卡的启用与禁用
// NetCardPoint 是 PNetCardStruct 的指针.
// Enabled true = 启用 false = 禁用
//---------------------------------------------------------------------------
bool __fastcall NetCardStateChange(void * NetCardPoint, bool Enabled)
{
PNetCardStruct NetCard = (PNetCardStruct)NetCardPoint;
DWORD DeviceId = NetCard->Id;
HDEVINFO hDevInfo = 0;
if (INVALID_HANDLE_VALUE == (hDevInfo =
SetupDiGetClassDevs(NULL,NULL,0,DIGCF_PRESENT ¦DIGCF_ALLCLASSES)))
return false;
SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};
DWORD Status, Problem;
if (!SetupDiEnumDeviceInfo(hDevInfo,DeviceId,&DeviceInfoData))
return false;

if (CM_Get_DevNode_Status(&Status, &Problem,
DeviceInfoData.DevInst,0) != CR_SUCCESS)
return false;

SP_PROPCHANGE_PARAMS PropChangeParams = {sizeof(SP_CLASSINSTALL_HEADER)};
PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
PropChangeParams.Scope = DICS_FLAG_GLOBAL;
if (Enabled)
{
if (!((Status & DN_HAS_PROBLEM) && (CM_PROB_DISABLED == Problem)))
{
NetCard->Disabled = false;
return false;
}
PropChangeParams.StateChange = DICS_ENABLE;
}
else
{
if ((Status & DN_HAS_PROBLEM) && (CM_PROB_DISABLED == Problem))
{
NetCard->Disabled = true;
return false;
}
if (!((Status & DN_DISABLEABLE) && (CM_PROB_HARDWARE_DISABLED != Problem)))
return false;
PropChangeParams.StateChange = DICS_DISABLE;
}

if (!SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData,
(SP_CLASSINSTALL_HEADER *)&PropChangeParams, sizeof(PropChangeParams)))
return false;
if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE, hDevInfo, &DeviceInfoData))
return false;
if (CM_Get_DevNode_Status(&Status, &Problem,
DeviceInfoData.DevInst,0) == CR_SUCCESS)
NetCard->Disabled = (Status & DN_HAS_PROBLEM) && (CM_PROB_DISABLED == Problem);
return true;
}
//---------------------------------------------------------------------------

[winter_leaf_wei]

但是这段代码好像仅仅可以在98下使用呀

[hiqin]

小女子无知，请问诸位朋友这是用什么语言做的，有点像C但不是是吧？我还想再问一下这段程序在DOS状态下用吗？让大家见笑了，我懂得很少不过很想多知道一点，可以帮我吗？

[winter_leaf_wei]

但是这段代码好像仅仅可以在98下使用呀
写错了，我是想说这段代码好像不能在98用呀