设备可以有忙碌状态的。如果设备被其他进程占用,那么你可能需要等待设备被释放才可以禁用。
至于怎么禁用设备的问题,可以去看Windows DDK的文档。
至于怎么禁用设备的问题,可以去看Windows DDK的文档。
解决方案 »
- 通过代理连接服务器,返回错误代码400
- 希望ActiveX 控件接口函数返回 char[],接口如何定义? WEB如何得到这个返回值?
- 如何判断 一个 excel 文件是否被打开?
- 来学习~!!散分表示下~~HOHO~~!
- MFC的打印预览不支持滚轮,怎么办?
- 如何把现有的图标作为按钮插入到工具栏的按钮?
- CMetaFileDC类在窗口滚动时坐标处理问题
- mfc通过ado调用SQLSERVER的存储过程出错
- 求助 修改程序图标问题
- 请问申明一个变量,然后在构造函数中用NEW再生成一个变量(如 LPDWORD FLAGS;然后FLAG=NEW DWORD)这个作用是什么呢?新手上路)请赐教!
- 在网上下了一个USB通信的源代码,但运行提示缺少hdisdi.h文件,为什么????新手
- vc++实现鼠标在视区描绘任意长度和任意点的折线
不过我想问的是如何指定某个USB或某个网卡等的禁用,对所有USB禁用方法给个邮笨我发给你
hDevInfo,
&DeviceInfoData,
SPDRP_DEVICEDESC,
&DataT,
(PBYTE)buffer,
buffersize,
&buffersize)
该函数可以获得设备的相关属性
//SPDRP_DEVICEDESC:根据设备名称 //SPDRP_HARDWAREID:根据硬件设备
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 bEnable)
{
BOOL bCanDisable;
bCanDisable = (IsDisableable(dwDevID,hDevInfo) && (!IsDisabled(dwDevID,hDevInfo))); if (bEnable)//Enable NetCard
{
if (!bCanDisable)
{
return EnableDevice(dwDevID,hDevInfo);
}
}
else //Disable NetCard
{
if (bCanDisable )
{
return DisableDevice(dwDevID,hDevInfo);
}
} return TRUE;
}BOOL SetCOMDevState(BOOL bEnable)
{
DWORD Status, Problem;
LPTSTR Buffer = NULL;
DWORD BufSize = 0;
BOOL bResult = FALSE; // 返回所有设备信息
HDEVINFO hDevInfo = SetupDiGetClassDevs(NULL,NULL,0,DIGCF_PRESENT|DIGCF_ALLCLASSES); if (INVALID_HANDLE_VALUE == hDevInfo )
return bResult; 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("Ports") ) == 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("USB") ) == 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 ( lstrcmp( szName, _T("USB-SERIAL") ) == 0 )//找到平安卡COM口转USB口读写设备
{
bResult = ControlDevice(DeviceId,hDevInfo,bEnable);
}
}
}
}
}
}
SetupDiDestroyDeviceInfoList(hDevInfo); return bResult;
} 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));
}
bEnable=FALSE禁用,反之则启用。