根据其VID / PID查找并popupUSB设备

好吧，我明白了。 Luke所链接的CodeProject文章展示了如何将驱动器盘符与设备接口相匹配，因此我将为该答案+1，但并不能解决整个问题。

我需要弄清楚如何找到我的USB设备的设备实例，并找到一种方法来匹配设备接口。 CM_Locate_DevNode（）和CM_Get_Child（）函数是关键。 最后，我可以使用IOCTL弹出设备。

我正在处理的设备是一个USB CD-ROM驱动器，这就是为什么我已经将设备类型硬编码到CDROM。 我无法相信需要多少代码来完成我认为是相当直接的任务（我引用了我的客户2小时来编写这些代码，我花了四天的时间才弄明白这一切）。 下面是最后的工作代码，希望能够拯救你们中的一个人，像我刚刚那样经历同样的地狱：

#include <SetupAPI.h> #include <cfgmgr32.h> #include <winioctl.h> // Finds the device interface for the CDROM drive with the given interface number. DEVINST GetDrivesDevInstByDeviceNumber(long DeviceNumber) { const GUID *guid = &GUID_DEVINTERFACE_CDROM; // Get device interface info set handle // for all devices attached to system HDEVINFO hDevInfo = SetupDiGetClassDevs(guid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE); if(hDevInfo == INVALID_HANDLE_VALUE) return 0; // Retrieve a context structure for a device interface of a device information set. BYTE buf[1024]; PSP_DEVICE_INTERFACE_DETAIL_DATA pspdidd = (PSP_DEVICE_INTERFACE_DETAIL_DATA)buf; SP_DEVICE_INTERFACE_DATA spdid; SP_DEVINFO_DATA spdd; DWORD dwSize; spdid.cbSize = sizeof(spdid); // Iterate through all the interfaces and try to match one based on // the device number. for(DWORD i = 0; SetupDiEnumDeviceInterfaces(hDevInfo, NULL,guid, i, &spdid); i++) { // Get the device path. dwSize = 0; SetupDiGetDeviceInterfaceDetail(hDevInfo, &spdid, NULL, 0, &dwSize, NULL); if(dwSize == 0 || dwSize > sizeof(buf)) continue; pspdidd->cbSize = sizeof(*pspdidd); ZeroMemory((PVOID)&spdd, sizeof(spdd)); spdd.cbSize = sizeof(spdd); if(!SetupDiGetDeviceInterfaceDetail(hDevInfo, &spdid, pspdidd, dwSize, &dwSize, &spdd)) continue; // Open the device. HANDLE hDrive = CreateFile(pspdidd->DevicePath,0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); if(hDrive == INVALID_HANDLE_VALUE) continue; // Get the device number. STORAGE_DEVICE_NUMBER sdn; dwSize = 0; if(DeviceIoControl(hDrive, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &sdn, sizeof(sdn), &dwSize, NULL)) { // Does it match? if(DeviceNumber == (long)sdn.DeviceNumber) { CloseHandle(hDrive); SetupDiDestroyDeviceInfoList(hDevInfo); return spdd.DevInst; } } CloseHandle(hDrive); } SetupDiDestroyDeviceInfoList(hDevInfo); return 0; } // Returns true if the given device instance belongs to the USB device with the given VID and PID. bool matchDevInstToUsbDevice(DEVINST device, DWORD vid, DWORD pid) { // This is the string we will be searching for in the device harware IDs. TCHAR hwid[64]; _stprintf(hwid, _T("VID_%04X&PID_%04X"), vid, pid); // Get a list of hardware IDs for all USB devices. ULONG ulLen; CM_Get_Device_ID_List_Size(&ulLen, NULL, CM_GETIDLIST_FILTER_NONE); TCHAR *pszBuffer = new TCHAR[ulLen]; CM_Get_Device_ID_List(NULL, pszBuffer, ulLen, CM_GETIDLIST_FILTER_NONE); // Iterate through the list looking for our ID. for(LPTSTR pszDeviceID = pszBuffer; *pszDeviceID; pszDeviceID += _tcslen(pszDeviceID) + 1) { // Some versions of Windows have the string in upper case and other versions have it // in lower case so just make it all upper. for(int i = 0; pszDeviceID[i]; i++) pszDeviceID[i] = toupper(pszDeviceID[i]); if(_tcsstr(pszDeviceID, hwid)) { // Found the device, now we want the grandchild device, which is the "generic volume" DEVINST MSDInst = 0; if(CR_SUCCESS == CM_Locate_DevNode(&MSDInst, pszDeviceID, CM_LOCATE_DEVNODE_NORMAL)) { DEVINST DiskDriveInst = 0; if(CR_SUCCESS == CM_Get_Child(&DiskDriveInst, MSDInst, 0)) { // Now compare the grandchild node against the given device instance. if(device == DiskDriveInst) return true; } } } } return false; } // Eject the given drive. void ejectDrive(TCHAR driveletter) { TCHAR devicepath[16]; _tcscpy(devicepath, _T("\\\\.\\?:")); devicepath[4] = driveletter; DWORD dwRet = 0; HANDLE hVol = CreateFile(devicepath, GENERIC_READ, FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); if(hVol == INVALID_HANDLE_VALUE) return; if(!DeviceIoControl(hVol, FSCTL_LOCK_VOLUME, 0, 0, 0, 0, &dwRet, 0)) return; if(!DeviceIoControl(hVol, FSCTL_DISMOUNT_VOLUME, 0, 0, 0, 0, &dwRet, 0)) return; DeviceIoControl(hVol, IOCTL_STORAGE_EJECT_MEDIA, 0, 0, 0, 0, &dwRet, 0); CloseHandle(hVol); } // Find a USB device by it's Vendor and Product IDs. When found, eject it. void usbEjectDevice(unsigned vid, unsigned pid) { TCHAR devicepath[8]; _tcscpy(devicepath, _T("\\\\.\\?:")); TCHAR drivepath[4]; _tcscpy(drivepath, _T("?:\\")); // Iterate through every drive letter and check if it is our device. for(TCHAR driveletter = _T('A'); driveletter <= _T('Z'); driveletter++) { // We are only interested in CDROM drives. drivepath[0] = driveletter; if(DRIVE_CDROM != GetDriveType(drivepath)) continue; // Get the "storage device number" for the current drive. long DeviceNumber = -1; devicepath[4] = driveletter; HANDLE hVolume = CreateFile(devicepath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); if(INVALID_HANDLE_VALUE == hVolume) continue; STORAGE_DEVICE_NUMBER sdn; DWORD dwBytesReturned = 0; if(DeviceIoControl(hVolume, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &sdn, sizeof(sdn), &dwBytesReturned, NULL)) DeviceNumber = sdn.DeviceNumber; CloseHandle(hVolume); if(DeviceNumber < 0) continue; // Use the data we have collected so far on our drive to find a device instance. DEVINST DevInst = GetDrivesDevInstByDeviceNumber(DeviceNumber); // If the device instance corresponds to the USB device we are looking for, eject it. if(DevInst) { if(matchDevInstToUsbDevice(DevInst, vid, pid)) ejectDrive(driveletter); } } }