C#语言能否读出U盘的VID&PID

关于USB口的hiddll有以下一些API，不知道是不是你所需要的

HidD_FlushQueue

HidD_FreePreparsedData

HidD_GetAttributes

HidD_GetConfiguration

HidD_GetFeature

HidD_GetHidGuid

HidD_GetIndexedString

HidD_GetInputReport

HidD_GetManufacturerString

HidD_GetMsGenreDescriptor

HidD_GetNumInputBuffers

HidD_GetPhysicalDescriptor

HidD_GetPreparsedData

HidD_GetProductString

HidD_GetSerialNumberString

HidD_Hello

HidD_SetConfiguration

HidD_SetFeature

HidD_SetNumInputBuffers

HidD_SetOutputReport

HidP_GetButtonCaps

HidP_GetCaps

HidP_GetData

HidP_GetExtendedAttributes

HidP_GetLinkCollectionNodes

HidP_GetSpecificButtonCaps

HidP_GetSpecificValueCaps

HidP_GetUsageValue

HidP_GetUsageValueArray

HidP_GetUsages

HidP_GetUsagesEx

HidP_GetValueCaps

HidP_InitializeReportForID

HidP_MaxDataListLength

HidP_MaxUsageListLength

HidP_SetData

HidP_SetScaledUsageValue

HidP_SetUsageValue

HidP_SetUsageValueArray

HidP_SetUsages

HidP_TranslateUsagesToI8042ScanCodes

HidP_UnsetUsages

HidP_UsageListDifference

HidservInstaller

WMI(Windows�0�3Management Instrumentation ) 非常强大，它可以以数据库的形式查询你的电脑的软件和硬件，在它的数据库里面，时刻保存着最新的软件信息和硬件信息，因此你可以用WMI来检测CUP 主频、温度，读取WINDOWS的进程 1 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 2 3 Dialogs, StdCtrls, ExtCtrls,ActiveX, ComObj; 4 5 6 7 procedure TForm1Button2Click(Sender: TObject); 8 9 var 10 11 Locator: OleVariant; 12 13 WMI: OleVariant; 14 15 RET: OleVariant; 16 17 Enum: IEnumVariant; 18 19 Tmp: OleVariant; 20 21 Value: Cardinal; 22 23 begin; 24 25 Locator := CreateOleObject('WbemScriptingSWbemLocator'); 26 27 WMI := LocatorConnectServer('', '', '', ''); 28 29 Ret := WMIExecQuery('SELECT FROM Win32_USBHub');//这里Win32_USBHub为检测项，详见下表 30 31 32 33 Enum:= IUnknown(RET_NewEnum) as IEnumVariant; 34 35 while (EnumNext(1, Tmp, Value) = S_OK) do 36 37 begin 38 39 if TmpName='USB Mass Storage Device' then 40 41 ShowMessage('这个u盘的硬件特征码是'+TmpPNPDeviceID);//Tmp为检测到返回的数据集合，其中PNPDeviceID为集合中的对象，包含了PID和VID码 42 43 end; 44 45 46 47 end; 48 49 50 51 Win32_USBHub只是冰山一角，常用的还有以下 52 53 54 55 "Win32_1394Controller" , 56 57 "Win32_BaseBoard" , 58 59 "Win32_Battery" , 60 61 "Win32_BIOS" , 62 63 "Win32_Bus" , 64 65 "Win32_CacheMemory" , 66 67 "Win32_CDROMDrive" , 68 69 "Win32_CurrentProbe" , 70 71 "Win32_DesktopMonitor" , 72 73 "Win32_DeviceMemoryAddress" , 74 75 "Win32_DiskDrive" , 76 77 "Win32_DisplayConfiguration" , 78 79 "Win32_DisplayControllerConfiguration", 80 81 "Win32_DMAChannel" , 82 83 "Win32_Fan" , 84 85 "Win32_FloppyController" , 86 87 "Win32_FloppyDrive" , 88 89 "Win32_HeatPipe" , 90 91 "Win32_IDEController" , 92 93 "Win32_InfraredDevice" , 94 95 "Win32_IRQResource" , 96 97 "Win32_Keyboard" , 98 99 "Win32_MemoryArray" , 100 101 "Win32_MemoryDevice" , 102 103 "Win32_MotherboardDevice" , 104 105 "Win32_NetworkAdapter" , 106 107 "Win32_NetworkAdapterConfiguration" , 108 109 "Win32_OnBoardDevice" , 110 111 "Win32_ParallelPort" , 112 113 "Win32_PCMCIAController" , 114 115 "Win32_PhysicalMemory" , 116 117 "Win32_PhysicalMemoryArray" , 118 119 "Win32_PnPEntity" , 120 121 "Win32_PointingDevice" , 122 123 "Win32_PortableBattery" , 124 125 "Win32_PortConnector" , 126 127 "Win32_PortResource" , 128 129 "Win32_POTSModem" , 130 131 "Win32_PowerManagementEvent" , 132 133 "Win32_Printer" , 134 135 "Win32_PrinterConfiguration" , 136 137 "Win32_PrintJob" , 138 139 "Win32_Processor" , 140 141 "Win32_Refrigeration" , 142 143 "Win32_SerialPort" , 144 145 "Win32_SerialPortConfiguration" , 146 147 "Win32_SMBIOSMemory" , 148 149 "Win32_SoundDevice" , 150 151 "Win32_SystemEnclosure" , 152 153 "Win32_SystemMemoryResource" , 154 155 "Win32_SystemSlot" , 156 157 "Win32_TapeDrive" , 158 159 "Win32_TemperatureProbe" , 160 161 "Win32_UninterruptiblePowerSupply" , 162 163 "Win32_USBController" , 164 165 "Win32_VideoConfiguration" , 166 167 "Win32_VideoController" , 168 169 "Win32_VoltageProbe"

将U盘插到电脑的USB接口，打开桌面上的计算机，查看可移动硬盘的属性，可以查看U盘的容量信息。

详细的芯片，容量等等信息推荐第三方软件（比如某些安全软件里的“U盘鉴定”工具），可以简单的评估U盘。

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