用SetupDi* 启用/禁用网卡

#include 
#include 
#include 
#include 
#include    // cfgmgr32.h 在Microsoft Windows 2000 DDK 中.
#pragma comment(lib,"setupapi.lib")

BOOL IsDisableable(DWORD dwDevID, HDEVINFO hDevInfo) ;
BOOL IsDisabled(DWORD dwDevID, HDEVINFO hDevInfo) ;
BOOL StateChange( DWORD dwNewState, DWORD dwDevID, HDEVINFO hDevInfo) ;

//////////////////////////////////////////////////////////////////////////
// 获得设备注册表中的内容
//////////////////////////////////////////////////////////////////////////
BOOL GetRegistryProperty( HDEVINFO DeviceInfoSet, 
                        PSP_DEVINFO_DATA DeviceInfoData, 
                        ULONG Property, 
                        PVOID Buffer, 
                        PULONG Length ) 
{ 
    while ( !SetupDiGetDeviceRegistryProperty( DeviceInfoSet, 
                                               DeviceInfoData, 
                                               Property, 
                                               NULL, 
                                               (BYTE *)*(TCHAR **)Buffer, 
                                               *Length, 
                                               Length)) 
    { 
        // 长度不够则重新分配缓冲区
        if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) 
        { 
            if (*(LPTSTR *)Buffer) 
                LocalFree(*(LPTSTR *)Buffer); 

            *(LPTSTR *)Buffer = (PCHAR)LocalAlloc(LPTR,*Length); 
        } 
        else 
        {
            return false; 
        }
    } 

    return (BOOL)(*(LPTSTR *)Buffer)[0]; 
} 

BOOL EnableDevice(DWORD dwDevID, HDEVINFO hDevInfo)
{
    return StateChange(DICS_ENABLE,dwDevID,hDevInfo);
}

BOOL DisableDevice(DWORD dwDevID, HDEVINFO hDevInfo)
{
    return StateChange(DICS_DISABLE,dwDevID,hDevInfo);
}

BOOL ControlDevice(DWORD dwDevID, HDEVINFO hDevInfo)
{
    BOOL bCanDisable;
    bCanDisable = (IsDisableable(dwDevID,hDevInfo) && (!IsDisabled(dwDevID,hDevInfo)));
    if(bCanDisable)
        return DisableDevice(dwDevID,hDevInfo);
    else
        return EnableDevice(dwDevID,hDevInfo);
}



void EnumNetCards() 
{         
    
    DWORD Status, Problem; 
    LPTSTR Buffer = NULL; 
    DWORD BufSize = 0; 

    // 返回所有设备信息
    HDEVINFO hDevInfo = SetupDiGetClassDevs(NULL,NULL,0,DIGCF_PRESENT|DIGCF_ALLCLASSES) ; 

    if (INVALID_HANDLE_VALUE == hDevInfo )        
        return; 

    
    SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)}; 

    
        

    //////////////////////////////////////////////////////////////////////////
    // 枚举设备
    //////////////////////////////////////////////////////////////////////////
    for ( DWORD DeviceId=0; 
        SetupDiEnumDeviceInfo( hDevInfo,DeviceId,&DeviceInfoData); 
        DeviceId++) 
    { 

        // 获得设备的状态
        if (CM_Get_DevNode_Status(&Status, &Problem, DeviceInfoData.DevInst ,0) != CR_SUCCESS) 
            continue; 
                

        // 获取设备类名
        TCHAR szDevName [MAX_PATH] = _T("") ;
        if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_CLASS , &Buffer, (PULONG)&BufSize)) 
        {
            lstrcpyn( szDevName, Buffer, MAX_PATH ) ;            
        }


        if ( lstrcmp( szDevName, _T("Net") ) == 0 )            
        {             
            TCHAR szName [MAX_PATH] = _T("") ;
            if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_ENUMERATOR_NAME , &Buffer, (PULONG)&BufSize)) 
            {
                lstrcpyn( szName, Buffer, MAX_PATH ) ;
            }


            if ( lstrcmp( szName, _T("ROOT") ) != 0 )                
            { 

                if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_DRIVER , &Buffer, (PULONG)&BufSize)) 
                {
                    lstrcpyn( szName, Buffer, MAX_PATH ) ;

                    // 获取设备描述
                    if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_DEVICEDESC , &Buffer, (PULONG)&BufSize)) 
                    {
                        
                        lstrcpyn( szName, Buffer, MAX_PATH ) ;

                        
                        if(ControlDevice(DeviceId,hDevInfo))
                        {
                            printf("Successful\n");
                        }
                        else 
                        {
                            printf("FAILED\n");        
                        }
                        
                    }                    
                }
            } 
        } 
    } 

    SetupDiDestroyDeviceInfoList(hDevInfo);
} 

BOOL StateChange( DWORD dwNewState, DWORD dwDevID, HDEVINFO hDevInfo)
{
    SP_PROPCHANGE_PARAMS PropChangeParams;
    SP_DEVINFO_DATA        DevInfoData = {sizeof(SP_DEVINFO_DATA)};
    SP_DEVINSTALL_PARAMS devParams;

    //查询设备信息
    if (!SetupDiEnumDeviceInfo( hDevInfo, dwDevID, &DevInfoData))
    {
        OutputDebugString("SetupDiEnumDeviceInfo FAILED");
        return FALSE;
    }

    //设置设备属性变化参数
    PropChangeParams.ClassInstallHeader.cbSize = sizeof(SP_CLASSINSTALL_HEADER);
    PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
    PropChangeParams.Scope = DICS_FLAG_GLOBAL; //使修改的属性保存在所有的硬件属性文件
    PropChangeParams.StateChange = dwNewState;
    PropChangeParams.HwProfile = 0;


    //改变设备属性
    if (!SetupDiSetClassInstallParams( hDevInfo,
                                        &DevInfoData,
                                        (SP_CLASSINSTALL_HEADER *)&PropChangeParams,
                                        sizeof(PropChangeParams)))
    {
        OutputDebugString("SetupDiSetClassInstallParams FAILED");
        return FALSE;
    }
    
    
    PropChangeParams.ClassInstallHeader.cbSize = sizeof(SP_CLASSINSTALL_HEADER);
    PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
    PropChangeParams.Scope = DICS_FLAG_CONFIGSPECIFIC;//使修改的属性保存在指定的属性文件
    PropChangeParams.StateChange = dwNewState;
    PropChangeParams.HwProfile = 0;

    //改变设备属性并调用安装服务
    if (!SetupDiSetClassInstallParams( hDevInfo,
                                       &DevInfoData,
                                       (SP_CLASSINSTALL_HEADER *)&PropChangeParams,
                                       sizeof(PropChangeParams)) ||
        !SetupDiCallClassInstaller(DIF_PROPERTYCHANGE, hDevInfo, &DevInfoData))
    {
        OutputDebugString("SetupDiSetClassInstallParams or SetupDiCallClassInstaller FAILED");
        return TRUE;
    }
    else
    { 
        //判断是否需要重新启动
        devParams.cbSize = sizeof(devParams);
        if (!SetupDiGetDeviceInstallParams( hDevInfo, &DevInfoData, &devParams))
        {
            OutputDebugString("SetupDiGetDeviceInstallParams FAILED");
            return FALSE;
        }

        if (devParams.Flags & (DI_NEEDRESTART|DI_NEEDREBOOT))
        {
            OutputDebugString("Need Restart Computer");
            return TRUE;
        }
        return TRUE;
    }
}


BOOL IsDisableable(DWORD dwDevID, HDEVINFO hDevInfo)
{
    SP_DEVINFO_DATA DevInfoData = {sizeof(SP_DEVINFO_DATA)};
    DWORD    dwDevStatus,dwProblem;
    if(!SetupDiEnumDeviceInfo(hDevInfo,dwDevID,&DevInfoData))
    {
        OutputDebugString("SetupDiEnumDeviceInfo FAILED");
        return FALSE;
    }
    //查询设备状态
    if(CM_Get_DevNode_Status(&dwDevStatus,&dwProblem,DevInfoData.DevInst,0)!=CR_SUCCESS)
    {
        OutputDebugString("CM_GET_DevNode_Status FAILED");
        return FALSE;
    }
    return ((dwDevStatus & DN_DISABLEABLE) && (dwProblem != CM_PROB_HARDWARE_DISABLED));
}

BOOL IsDisabled(DWORD dwDevID, HDEVINFO hDevInfo)
{
    SP_DEVINFO_DATA DevInfoData = {sizeof(SP_DEVINFO_DATA)};
    DWORD    dwDevStatus,dwProblem;
    if(!SetupDiEnumDeviceInfo(hDevInfo,dwDevID,&DevInfoData))
    {
        OutputDebugString("SetupDiEnumDeviceInfo FAILED");
        return FALSE;
    }

    //查询设备状态
    if(CM_Get_DevNode_Status(&dwDevStatus,&dwProblem,DevInfoData.DevInst,0)!=CR_SUCCESS)
    {
        OutputDebugString("CM_GET_DevNode_Status FAILED");
        return FALSE;
    }
    return ((dwDevStatus & DN_HAS_PROBLEM) && (dwProblem == CM_PROB_DISABLED));
}

int main(int argc, char* argv[])
{        
    EnumNetCards() ;
    return 0 ;
}  
#include 
#include 
#include 
#include    // cfgmgr32.h 在Microsoft Windows 2000 DDK 中.
#pragma comment(lib,"setupapi.lib")

BOOL IsDisableable(DWORD dwDevID, HDEVINFO hDevInfo) ;
BOOL IsDisabled(DWORD dwDevID, HDEVINFO hDevInfo) ;
BOOL StateChange( DWORD dwNewState, DWORD dwDevID, HDEVINFO hDevInfo) ;

//////////////////////////////////////////////////////////////////////////
// 获得设备注册表中的内容
//////////////////////////////////////////////////////////////////////////
BOOL GetRegistryProperty( HDEVINFO DeviceInfoSet, 
                        PSP_DEVINFO_DATA DeviceInfoData, 
                        ULONG Property, 
                        PVOID Buffer, 
                        PULONG Length ) 
{ 
    while ( !SetupDiGetDeviceRegistryProperty( DeviceInfoSet, 
                                               DeviceInfoData, 
                                               Property, 
                                               NULL, 
                                               (BYTE *)*(TCHAR **)Buffer, 
                                               *Length, 
                                               Length)) 
    { 
        // 长度不够则重新分配缓冲区
        if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) 
        { 
            if (*(LPTSTR *)Buffer) 
                LocalFree(*(LPTSTR *)Buffer); 

            *(LPTSTR *)Buffer = (PCHAR)LocalAlloc(LPTR,*Length); 
        } 
        else 
        {
            return false; 
        }
    } 

    return (BOOL)(*(LPTSTR *)Buffer)[0]; 
} 

BOOL EnableDevice(DWORD dwDevID, HDEVINFO hDevInfo)
{
    return StateChange(DICS_ENABLE,dwDevID,hDevInfo);
}

BOOL DisableDevice(DWORD dwDevID, HDEVINFO hDevInfo)
{
    return StateChange(DICS_DISABLE,dwDevID,hDevInfo);
}

BOOL ControlDevice(DWORD dwDevID, HDEVINFO hDevInfo)
{
    BOOL bCanDisable;
    bCanDisable = (IsDisableable(dwDevID,hDevInfo) && (!IsDisabled(dwDevID,hDevInfo)));
    if(bCanDisable)
        return DisableDevice(dwDevID,hDevInfo);
    else
        return EnableDevice(dwDevID,hDevInfo);
}



void EnumNetCards() 
{         
    
    DWORD Status, Problem; 
    LPTSTR Buffer = NULL; 
    DWORD BufSize = 0; 

    // 返回所有设备信息
    HDEVINFO hDevInfo = SetupDiGetClassDevs(NULL,NULL,0,DIGCF_PRESENT|DIGCF_ALLCLASSES) ; 

    if (INVALID_HANDLE_VALUE == hDevInfo )        
        return; 

    
    SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)}; 

    
        

    //////////////////////////////////////////////////////////////////////////
    // 枚举设备
    //////////////////////////////////////////////////////////////////////////
    for ( DWORD DeviceId=0; 
        SetupDiEnumDeviceInfo( hDevInfo,DeviceId,&DeviceInfoData); 
        DeviceId++) 
    { 

        // 获得设备的状态
        if (CM_Get_DevNode_Status(&Status, &Problem, DeviceInfoData.DevInst ,0) != CR_SUCCESS) 
            continue; 
                

        // 获取设备类名
        TCHAR szDevName [MAX_PATH] = _T("") ;
        if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_CLASS , &Buffer, (PULONG)&BufSize)) 
        {
            lstrcpyn( szDevName, Buffer, MAX_PATH ) ;            
        }


        if ( lstrcmp( szDevName, _T("Net") ) == 0 )            
        {             
            TCHAR szName [MAX_PATH] = _T("") ;
            if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_ENUMERATOR_NAME , &Buffer, (PULONG)&BufSize)) 
            {
                lstrcpyn( szName, Buffer, MAX_PATH ) ;
            }


            if ( lstrcmp( szName, _T("ROOT") ) != 0 )                
            { 

                if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_DRIVER , &Buffer, (PULONG)&BufSize)) 
                {
                    lstrcpyn( szName, Buffer, MAX_PATH ) ;

                    // 获取设备描述
                    if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_DEVICEDESC , &Buffer, (PULONG)&BufSize)) 
                    {
                        
                        lstrcpyn( szName, Buffer, MAX_PATH ) ;

                        
                        if(ControlDevice(DeviceId,hDevInfo))
                        {
                            printf("Successful\n");
                        }
                        else 
                        {
                            printf("FAILED\n");        
                        }
                        
                    }                    
                }
            } 
        } 
    } 

    SetupDiDestroyDeviceInfoList(hDevInfo);
} 

BOOL StateChange( DWORD dwNewState, DWORD dwDevID, HDEVINFO hDevInfo)
{
    SP_PROPCHANGE_PARAMS PropChangeParams;
    SP_DEVINFO_DATA        DevInfoData = {sizeof(SP_DEVINFO_DATA)};
    SP_DEVINSTALL_PARAMS devParams;

    //查询设备信息
    if (!SetupDiEnumDeviceInfo( hDevInfo, dwDevID, &DevInfoData))
    {
        OutputDebugString("SetupDiEnumDeviceInfo FAILED");
        return FALSE;
    }

    //设置设备属性变化参数
    PropChangeParams.ClassInstallHeader.cbSize = sizeof(SP_CLASSINSTALL_HEADER);
    PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
    PropChangeParams.Scope = DICS_FLAG_GLOBAL; //使修改的属性保存在所有的硬件属性文件
    PropChangeParams.StateChange = dwNewState;
    PropChangeParams.HwProfile = 0;


    //改变设备属性
    if (!SetupDiSetClassInstallParams( hDevInfo,
                                        &DevInfoData,
                                        (SP_CLASSINSTALL_HEADER *)&PropChangeParams,
                                        sizeof(PropChangeParams)))
    {
        OutputDebugString("SetupDiSetClassInstallParams FAILED");
        return FALSE;
    }
    
    
    PropChangeParams.ClassInstallHeader.cbSize = sizeof(SP_CLASSINSTALL_HEADER);
    PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
    PropChangeParams.Scope = DICS_FLAG_CONFIGSPECIFIC;//使修改的属性保存在指定的属性文件
    PropChangeParams.StateChange = dwNewState;
    PropChangeParams.HwProfile = 0;

    //改变设备属性并调用安装服务
    if (!SetupDiSetClassInstallParams( hDevInfo,
                                       &DevInfoData,
                                       (SP_CLASSINSTALL_HEADER *)&PropChangeParams,
                                       sizeof(PropChangeParams)) ||
        !SetupDiCallClassInstaller(DIF_PROPERTYCHANGE, hDevInfo, &DevInfoData))
    {
        OutputDebugString("SetupDiSetClassInstallParams or SetupDiCallClassInstaller FAILED");
        return TRUE;
    }
    else
    { 
        //判断是否需要重新启动
        devParams.cbSize = sizeof(devParams);
        if (!SetupDiGetDeviceInstallParams( hDevInfo, &DevInfoData, &devParams))
        {
            OutputDebugString("SetupDiGetDeviceInstallParams FAILED");
            return FALSE;
        }

        if (devParams.Flags & (DI_NEEDRESTART|DI_NEEDREBOOT))
        {
            OutputDebugString("Need Restart Computer");
            return TRUE;
        }
        return TRUE;
    }
}


BOOL IsDisableable(DWORD dwDevID, HDEVINFO hDevInfo)
{
    SP_DEVINFO_DATA DevInfoData = {sizeof(SP_DEVINFO_DATA)};
    DWORD    dwDevStatus,dwProblem;
    if(!SetupDiEnumDeviceInfo(hDevInfo,dwDevID,&DevInfoData))
    {
        OutputDebugString("SetupDiEnumDeviceInfo FAILED");
        return FALSE;
    }
    //查询设备状态
    if(CM_Get_DevNode_Status(&dwDevStatus,&dwProblem,DevInfoData.DevInst,0)!=CR_SUCCESS)
    {
        OutputDebugString("CM_GET_DevNode_Status FAILED");
        return FALSE;
    }
    return ((dwDevStatus & DN_DISABLEABLE) && (dwProblem != CM_PROB_HARDWARE_DISABLED));
}

BOOL IsDisabled(DWORD dwDevID, HDEVINFO hDevInfo)
{
    SP_DEVINFO_DATA DevInfoData = {sizeof(SP_DEVINFO_DATA)};
    DWORD    dwDevStatus,dwProblem;
    if(!SetupDiEnumDeviceInfo(hDevInfo,dwDevID,&DevInfoData))
    {
        OutputDebugString("SetupDiEnumDeviceInfo FAILED");
        return FALSE;
    }

    //查询设备状态
    if(CM_Get_DevNode_Status(&dwDevStatus,&dwProblem,DevInfoData.DevInst,0)!=CR_SUCCESS)
    {
        OutputDebugString("CM_GET_DevNode_Status FAILED");
        return FALSE;
    }
    return ((dwDevStatus & DN_HAS_PROBLEM) && (dwProblem == CM_PROB_DISABLED));
}

int main(int argc, char* argv[])
{        
    EnumNetCards() ;
    return 0 ;
}