How to disable a device
look up SetupDiChangeState function in MSDN, pay attention to DICS_DISABLE flag.
Disables the device. If the device is disableable but this function cannot disable the device dynamically,
this function s the device to be disabled the next time the machine reboots.
look up SetupDiChangeState function in MSDN, pay attention to DICS_DISABLE flag.
Disables the device. If the device is disableable but this function cannot disable the device dynamically,
this function s the device to be disabled the next time the machine reboots.
How to disable NIC under Win2K/Win98
Answer by： flyboycsdn(飞仔) 2002-10-25 13:18:37
// Hardware.cpp : Implementation of CHardware
#include "stdafx.h"
#include "NetCA_HARDWARE.h"
#include "Hardware.h"
#define UnknownDevice TEXT("<Unknown Device>")/////////////////////////////////////////////////////////////////////////////
// CHardware/************************************************* parameter: DriverID[in]--unique ID of the device in registry
pVal[out,retval]--，return 0 if succeed，return 1 if fail
2002－6－21**********************************************************/
STDMETHODIMP CHardware::Disable(BSTR DriverID, long *pVal)
{
BOOL ShowHidden = 0;
HDEVINFO hDevInfo = 0;
long len;
//init the value
TIndex = -1;
len = wcstombs(NULL,DriverID,wcslen(DriverID));
len = len + 1;
DrvID = (char *)malloc(len);
memset(DrvID,0,len+1);
wcstombs(DrvID,DriverID,wcslen(DriverID));
if (INVALID_HANDLE_VALUE == (hDevInfo =
SetupDiGetClassDevs(NULL,NULL,NULL,
DIGCF_PRESENT|DIGCF_ALLCLASSES)))
{ *pVal = -1;
return S_OK;
}
//get the index of drv in the set
EnumAddDevices(ShowHidden,hDevInfo);//disable the drv
// if ((IsDisableable(TIndex,hDevInfo))&&(!(TIndex==-1)))
if (!IsDisabled(TIndex,hDevInfo))
if (IsDisableable(TIndex,hDevInfo))
if (StateChange(DICS_DISABLE,TIndex,hDevInfo))
*pVal = 0;
else
*pVal = -1;
else
*pVal = 1;
else
*pVal = 0; if(hDevInfo)
SetupDiDestroyDeviceInfoList(hDevInfo);
return S_OK;
}BOOL CHardware::EnumAddDevices(BOOL ShowHidden, HDEVINFO hDevInfo)
{
DWORD i, Status, Problem; LPTSTR IOName=NULL;
DWORD len=0;
SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};
//
// Enumerate though all the devices.
//
for (i=0;SetupDiEnumDeviceInfo(hDevInfo,i,&DeviceInfoData);i++)
{
//
// Should we display this device, or move onto the next one.
//
if (CR_SUCCESS != CM_Get_DevNode_Status(&Status, &Problem,
DeviceInfoData.DevInst,0))
{
continue;
} if (!(ShowHidden || !((Status & DN_NO_SHOW_IN_DM) ||
IsClassHidden(&DeviceInfoData.ClassGuid))))
continue; //
// Get a friendly name for the device.
//
ConstructDeviceName(hDevInfo,&DeviceInfoData,
&IOName,
(PULONG)&len);
if (strcmp(IOName,DrvID) == 0)
{
TIndex = i;
return TRUE;
}
}
return TRUE;
}
BOOL CHardware::IsClassHidden(GUID *ClassGuid)
{
BOOL bHidden = FALSE;
HKEY hKeyClass; //
// If the devices class has the NoDisplayClass value then
// don't display this device.
//
if (hKeyClass = SetupDiOpenClassRegKey(ClassGuid,KEY_READ))
{
bHidden = (RegQueryValueEx(hKeyClass,
REGSTR_VAL_NODISPLAYCLASS,
NULL, NULL, NULL, NULL) == ERROR_SUCCESS);
RegCloseKey(hKeyClass);
} return bHidden;
}BOOL CHardware::ConstructDeviceName(HDEVINFO DeviceInfoSet, PSP_DEVINFO_DATA DeviceInfoData, PVOID Buffer, PULONG Length)
{
if (!GetRegistryProperty(DeviceInfoSet,
DeviceInfoData,
SPDRP_DRIVER ,
Buffer,
Length))
{
if (!GetRegistryProperty(DeviceInfoSet,
DeviceInfoData,
SPDRP_DEVICEDESC ,
Buffer,
Length))
{
if (!GetRegistryProperty(DeviceInfoSet,
DeviceInfoData,
SPDRP_CLASS ,
Buffer,
Length))
{
if (!GetRegistryProperty(DeviceInfoSet,
DeviceInfoData,
SPDRP_CLASSGUID ,
Buffer,
Length))
{
*Length = (_tcslen(UnknownDevice)+1)*sizeof(TCHAR);
Buffer =(char *)malloc(*Length);
_tcscpy(*(LPTSTR *)Buffer,UnknownDevice);
}
}
} }
return TRUE;
}BOOL CHardware::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)
{
//
// We need to change the buffer size.
//
if (*(LPTSTR *)Buffer)
LocalFree(*(LPTSTR *)Buffer);
*(LPTSTR *)Buffer = (PCHAR)LocalAlloc(LPTR,*Length);
}
else
{
//
// Unknown Failure.
//
return FALSE;
}
} return (*(LPTSTR *)Buffer)[0];}BOOL CHardware::StateChange(DWORD NewState, DWORD SelectedItem, HDEVINFO hDevInfo)
{
SP_PROPCHANGE_PARAMS PropChangeParams = {sizeof(SP_CLASSINSTALL_HEADER)};
SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};
//
// Get a handle to the Selected Item.
//
if (!SetupDiEnumDeviceInfo(hDevInfo,SelectedItem,&DeviceInfoData))
{ return FALSE;
} //
// Set the PropChangeParams structure.
//
PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
PropChangeParams.Scope = DICS_FLAG_GLOBAL;
PropChangeParams.StateChange = NewState; if (!SetupDiSetClassInstallParams(hDevInfo,
&DeviceInfoData,
(SP_CLASSINSTALL_HEADER *)&PropChangeParams,
sizeof(PropChangeParams)))
{
return FALSE;
} //
// Call the ClassInstaller and perform the change.
//
if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,
hDevInfo,
&DeviceInfoData))
{
return TRUE;
}
return TRUE;
}BOOL CHardware::IsDisabled(DWORD SelectedItem, HDEVINFO hDevInfo)
{
SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};
DWORD Status, Problem; //
// Get a handle to the Selected Item.
//
if (!SetupDiEnumDeviceInfo(hDevInfo,SelectedItem,&DeviceInfoData))
{ return FALSE;
} if (CR_SUCCESS != CM_Get_DevNode_Status(&Status, &Problem,
DeviceInfoData.DevInst,0))
{ return FALSE;
} return ((Status & DN_HAS_PROBLEM) && (CM_PROB_DISABLED == Problem)) ;
}BOOL CHardware::IsDisableable(DWORD SelectedItem, HDEVINFO hDevInfo)
{
SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};
DWORD Status, Problem; //
// Get a handle to the Selected Item.
//
if (!SetupDiEnumDeviceInfo(hDevInfo,SelectedItem,&DeviceInfoData))
{ return FALSE;
} if (CR_SUCCESS != CM_Get_DevNode_Status(&Status, &Problem,
DeviceInfoData.DevInst,0))
{ return FALSE;
} return ((Status & DN_DISABLEABLE) &&
(CM_PROB_HARDWARE_DISABLED != Problem));
}STDMETHODIMP CHardware::Enable(BSTR DriverID, long *pVal)
{
BOOL ShowHidden = 0;
HDEVINFO hDevInfo = 0;
long len;
//init the value
TIndex = -1;
len = wcstombs(NULL,DriverID,wcslen(DriverID));
len = len + 1;
DrvID = (char *)malloc(len);
memset(DrvID,0,len+1);
wcstombs(DrvID,DriverID,wcslen(DriverID));
if (INVALID_HANDLE_VALUE == (hDevInfo =
SetupDiGetClassDevs(NULL,NULL,NULL,
DIGCF_PRESENT|DIGCF_ALLCLASSES)))
{ *pVal = -1;
return S_OK;
}
//get the index of drv in the set
EnumAddDevices(ShowHidden,hDevInfo);//disable the drv
if (IsDisabled(TIndex,hDevInfo))
if (StateChange(DICS_ENABLE,TIndex,hDevInfo))
*pVal = 0;
else
*pVal = -1;
else
*pVal = 0;
if(hDevInfo)
SetupDiDestroyDeviceInfoList(hDevInfo);
return S_OK;
}