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const
DIGCF_PRESENT = $00000002;
DIGCF_DEVICEINTERFACE = $00000010;
ANYSIZE_ARRAY = 1;
SetupAPI = 'SetupAPI.DLL';
type
HDEVINFO = Pointer;
ULONG_PTR = DWORD;
PSPDevInfoData = ^TSPDevInfoData;
SP_DEVINFO_DATA = packed record
cbSize: DWORD;
ClassGuid: TGUID;
DevInst: DWORD;
Reserved: ULONG_PTR;
end;
{$EXTERNALSYM SP_DEVINFO_DATA}
TSPDevInfoData = SP_DEVINFO_DATA;
PSPDeviceInterfaceData = ^TSPDeviceInterfaceData;
SP_DEVICE_INTERFACE_DATA = packed record
cbSize: DWORD;
InterfaceClassGuid: TGUID;
Flags: DWORD;
Reserved: ULONG_PTR;
end;
{$EXTERNALSYM SP_DEVICE_INTERFACE_DATA}
TSPDeviceInterfaceData = SP_DEVICE_INTERFACE_DATA;
PSPDeviceInterfaceDetailDataA = ^TSPDeviceInterfaceDetailDataA;
SP_DEVICE_INTERFACE_DETAIL_DATA_A = packed record
cbSize: DWORD;
DevicePath: array[0..ANYSIZE_ARRAY - 1] of AnsiChar;
end;
{$EXTERNALSYM SP_DEVICE_INTERFACE_DETAIL_DATA_A}
TSPDeviceInterfaceDetailDataA = SP_DEVICE_INTERFACE_DETAIL_DATA_A;
function SetupDiGetClassDevsA(ClassGuid: PGUID; const Enumerator: PAnsiChar;
hwndParent: HWND; Flags: DWORD): HDEVINFO; stdcall; external SetupAPI;
function SetupDiEnumDeviceInterfaces(DeviceInfoSet: HDEVINFO;
DeviceInfoData: PSPDevInfoData; const InterfaceClassGuid: TGUID;
MemberIndex: DWORD; var DeviceInterfaceData: TSPDeviceInterfaceData): BOOL; stdcall; external SetupAPI;
{$EXTERNALSYM SetupDiEnumDeviceInterfaces}
function SetupDiGetDeviceInterfaceDetailA(DeviceInfoSet: HDEVINFO;
DeviceInterfaceData: PSPDeviceInterfaceData;
DeviceInterfaceDetailData: PSPDeviceInterfaceDetailDataA;
DeviceInterfaceDetailDataSize: DWORD; var RequiredSize: DWORD;
Device: PSPDevInfoData): BOOL; stdcall; external SetupAPI;
function SetupDiDestroyDeviceInfoList(DeviceInfoSet: HDEVINFO): BOOL; stdcall; external SetupAPI;
function GetUSBDiskID(const DiskID: string; var PID: string): Boolean;
var
USBGuid: TGUID;
USBHandle: HDEVINFO;
Success: LongBool;
Devn: Integer;
DevData: TSPDevInfoData;
DeviceInterfaceData: TSPDeviceInterfaceData;
FunctionClassDeviceData: PSPDeviceInterfaceDetailDataA;
BytesReturned: DWORD;
Reg: TRegistry;
RegData: array of Char;
i, RegSize: Integer;
Str, USBPath: string;
begin
Result := false;
Pid := '';
Reg := TRegistry.Create;
try
Reg.RootKey := HKEY_LOCAL_MACHINE;
Reg.OpenKey('SYSTEM\MountedDevices', false);
RegSize := Reg.GetDataSize(Format('\DosDevices\%s', [DiskID]));
SetLength(RegData, RegSize + 1);
Reg.ReadBinaryData(Format('\DosDevices\%s', [DiskID]), RegData[0], RegSize + 1);
for i := 0 to RegSize - 1 do
if RegData[i] <> #0 then Str := Str + RegData[i];
Str := Copy(Str, Pos('#RemovableMedia#', Str) + 16, Length(Str));
Str := Copy(Str, 1, Pos('RM', Str) - 2);
Str := UpperCase(Str);
Reg.CloseKey;
USBGuid := StringToGUID('{53f56307-b6bf-11d0-94f2-00a0c91efb8b}');
USBHandle := SetupDiGetClassDevsA(@USBGuid, nil, 0, DIGCF_PRESENT or
DIGCF_DEVICEINTERFACE);
if USBHandle = Pointer(INVALID_HANDLE_VALUE) then Exit;
Devn := 0;
repeat
DeviceInterfaceData.cbSize := SizeOf(TSPDeviceInterfaceData);
Success := SetupDiEnumDeviceInterfaces(USBHandle, nil, USBGuid, Devn,
DeviceInterfaceData);
if Success then
begin
DevData.cbSize := SizeOf(DevData);
BytesReturned := 0;
SetupDiGetDeviceInterfaceDetailA(USBHandle, @DeviceInterfaceData, nil,
0, BytesReturned, @DevData);
if (BytesReturned <> 0) and (GetLastError = ERROR_INSUFFICIENT_BUFFER) then
begin
FunctionClassDeviceData := AllocMem(BytesReturned);
FunctionClassDeviceData^.cbSize := SizeOf(TSPDeviceInterfaceDetailDataA);
if SetupDiGetDeviceInterfaceDetailA(USBHandle, @DeviceInterfaceData,
FunctionClassDeviceData, BytesReturned, BytesReturned, @DevData) then
begin
USBPath := StrPas(PChar(@FunctionClassDeviceData.DevicePath));
if Reg.OpenKeyReadOnly(Format('SYSTEM\CurrentControlSet\Enum%s',
[StringReplace(Copy(USBPath, 4, Pos('{', USBPath) - 5),
'#', '\', [rfReplaceAll])])) then
if UpperCase(Reg.ReadString('ParentIdPrefix')) = Str then
begin
Delete(USBPath, 1, Pos('#', USBPath));
PID := Copy(USBPath, Pos('#', USBPath) + 1, Length(USBPath));
PID := Copy(PID, 1, Pos('#{', PID) - 1);
PID := UpperCase(StringReplace(PID, '&', '', [rfReplaceAll]));
Result := True;
Break;
end;
Reg.CloseKey;
Inc(Devn);
end;
FreeMem(FunctionClassDeviceData);
end;
end;
until not Success;
SetupDiDestroyDeviceInfoList(USBHandle);
finally
Reg.Free;
end;
end;
使用方法：
procedure TForm1.Button1Click(Sender: TObject);
var
Drv, Pid: string;
begin
Drv := ExtractFileDrive(ParamStr(0));
if GetDriveType(PChar(Drv + '\')) <> DRIVE_REMOVABLE then
Application.MessageBox('对不起，请把本程序放至到优盘上使用!', 'Error', MB_ICONHAND)
else if GetUSBDiskID(Drv, Pid) then ShowMessage(Pid);
end;
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