déconnection USB clef disque dure HUB WMI

**ouiouioui** · 13/12/2010, 14h41

Bonjour, j'ai un programme qui affiche une fenêtre qui liste les périphériques USB de stockage les clés et disques durs. Cela permet de proposer de faire une sauvegarde, mais après la sauvegarde je voudrais proposer l'utilisateur de déconnecter son périphérique USB plutôt qu'il est à le faire manuellement en cliquant dans la barre des taches ce que certains ne font pas et ça cause des problèmes.

J'ai lu des dizaines voire des centaines de sujets, notamment ici
http://www.developpez.net/forums/d47...ique-usb-code/
http://www.developpez.net/forums/d31...ection-disque/

mais je bloque malgré tous les test de code ce qui fonctionne le mieux pour l'instant est ci-joint. L'éjection fonctionne avec les clés USB mais pas totalement elle reste affichée dans Windows mais est inutilisable, les disques durs cela ne fait rien. J'ai fait des essais avec le disque dur branché sur un port USB et une clé mémoire branchée sur un HUB.

j'ai fait un projet démo pour vous montrer.

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
Unit Unit1;
 
Interface
 
Uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, WMIListUSBDevice;
 
Const
  DBT_DEVICEARRIVAL        = $8000;     // system detected a new device
  DBT_DEVICEREMOVECOMPLETE = $8004;     // device is gone
  DBT_DEVTYP_VOLUME        = $00000002; // device volume class
  WM_REFRESHUSBDRIVELIST   = WM_USER + 0;
 
Type
  PDevBroadcastHdr    = ^DEV_BROADCAST_HDR;
  PDevBroadcastHeader = PDevBroadcastHdr;
 
  DEV_BROADCAST_HDR = Packed Record
    dbch_size:       DWORD;
    dbch_devicetype: DWORD;
    dbch_reserved:   DWORD;
  End;
 
  PDevBroadcastVolume = ^DEV_BROADCAST_VOLUME;
 
  DEV_BROADCAST_VOLUME = Packed Record
    dbch_size:       DWORD;
    dbch_devicetype: DWORD;
    dbch_reserved:   DWORD;
    dbcv_unitmask:   DWORD;
    dbcv_flags:      Word;
  End;
 
Type
  TForm1 = Class(TForm)
    btGetUSBDriveList:    TButton;
    cbUSBDriveList:       TComboBox;
    btDisconnectUSBDrive: TButton;
    lSelectedUSBDrive:    TLabel;
    Procedure btGetUSBDriveListClick(Sender: TObject);
    Procedure cbUSBDriveListDrawItem(Control: TWinControl; Index: Integer; Rect: TRect; State: TOwnerDrawState);
    Procedure btDisconnectUSBDriveClick(Sender: TObject);
    Procedure cbUSBDriveListCloseUp(Sender: TObject);
  Private
    Procedure WMDeviceChange(Var Msg: TMessage); Message WM_DEVICECHANGE;
    Procedure WMRefreshUSBDriveList(Var Msg: TMessage); Message WM_REFRESHUSBDRIVELIST;
  Public
    { Déclarations publiques }
  End;
 
Var
  Form1: TForm1;
 
Implementation
 
{$R *.dfm}
 
Procedure TForm1.btDisconnectUSBDriveClick(Sender: TObject);
Begin
  (Sender As TButton).Enabled := False;
  btGetUSBDriveList.Enabled   := False;
  Try
    USBDrive.EjectUSBDrive(cbUSBDriveList.ItemIndex);
  Finally
    btGetUSBDriveList.Enabled   := True;
    (Sender As TButton).Enabled := True;
  End;
End;
 
Procedure TForm1.btGetUSBDriveListClick(Sender: TObject);
Begin
  (Sender As TButton).Enabled  := False;
  btDisconnectUSBDrive.Enabled := False;
  Try
    USBDrive.GetUSBLogicalDriveLetter(cbUSBDriveList);
    If cbUSBDriveList.Items.Count > 0 Then
    Begin
      cbUSBDriveList.DroppedDown   := True;
      btDisconnectUSBDrive.Enabled := True;
    End;
  Finally
    (Sender As TButton).Enabled := True;
  End;
End;
 
Procedure TForm1.cbUSBDriveListCloseUp(Sender: TObject);
Begin
  If ((Sender As TComboBox).ItemIndex = -1) Or ((Sender As TComboBox).ItemIndex > USBDrive.DriveList.Count - 1) Then
    lSelectedUSBDrive.Caption := ''
  Else
    With USBDrive.DriveList.Items[(Sender As TComboBox).ItemIndex] Do
      lSelectedUSBDrive.Caption := Format('drive: %0:s - name: %1:s - disque physique: %4:s' + sLineBreak +
        'FreeSpace: %2:u - TotalSpace: %3:u - Index icône: %5:u', [Drive, VolumeName, FreeSpace, TotalSpace, DiskPhysique, IdxIcone]);
        End;
 
Procedure TForm1.cbUSBDriveListDrawItem(Control: TWinControl; Index: Integer; Rect: TRect; State: TOwnerDrawState);
Var
  Offset, I: Integer;
Begin
  With Control As TComboBox Do
  Begin
    If Not Index In [0..Items.Count - 1] Then
      Exit;
    Offset := USBDrive.ImagesIconeUSBDrive.Width + 8;
    If USBDrive.ImagesIconeUSBDrive.Count > 0 Then
    Begin
      I := Integer(Items.Objects[Index]);
      USBDrive.ImagesIconeUSBDrive.Draw(Canvas, Rect.Left + 4, Rect.Top, I);
      Rect.Left  := Rect.Left + Offset;
      Rect.Right := Rect.Left + Canvas.TextWidth(Items[Index]) + 6;
    End;
    Canvas.FillRect(Rect);
    If odSelected In State Then
      Canvas.DrawFocusRect(Rect);
    Inc(Rect.Left, 3);
    Canvas.TextOut(Rect.Left, Rect.Top, Items[Index]);
  End;
End;
 
Procedure TForm1.WMDeviceChange(Var Msg: TMessage);
Begin
  Inherited;
  Case Msg.WParam Of
    DBT_DEVICEARRIVAL, DBT_DEVICEREMOVECOMPLETE:
      PostMessage(self.Handle, WM_REFRESHUSBDRIVELIST, 0, 0);
  End;
End;
 
Procedure TForm1.WMRefreshUSBDriveList(Var Msg: TMessage);
Begin
  USBDrive.GetUSBLogicalDriveLetter(cbUSBDriveList);
End;
 
End.

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
Unit WMIListUSBDevice;
 
Interface
 
Uses
  Windows, SysUtils, Classes, ComObj, ActiveX, UrlMon, ShellAPI, Controls,
  ImgList, Graphics, StdCtrls;
 
Type
  TDrive = Class
    Drive:                    Char;
    DiskPhysique, VolumeName: String;
    FreeSpace, TotalSpace:    Int64;
    IdxIcone:                 Integer;
  Public
    Constructor Create(ADrive: Char; ADiskPhysique, AVolumeName: String; AFreeSpace, ATotalSpace: Int64; AIdxIcone: Integer);
  End;
 
  TDriveList = Class(TList)
  Private
    Function GetItem(Index: Integer): TDrive;
  Public
    Destructor Destroy; Override;
    Function AddDrive(ADrive: Char; ADiskPhysique, AVolumeName: String; AFreeSpace, ATotalSpace: Int64; AIdxIcone: Integer): Integer;
    Procedure Clear; Override;
    Procedure Delete(Index: Integer);
    Property Items[Index: Integer]: TDrive Read GetItem;
  End;
 
  TUSBDrive = Class
  Private
    FSmall: Integer;
    Function EjectVolume(ADrive: Char): Boolean;
    Function AutoEjectVolume(AVolumeHandle: THandle): Boolean;
    Function DismountVolume(AVolumeHandle: THandle): Boolean;
    Function FormatSize(FreeSpace, Size: String): String;
    Function LockVolume(AVolumeHandle: THandle): Boolean;
    Function OpenVolume(ADrive: Char): THandle;
    Function PreventRemovalOfVolume(AVolumeHandle: THandle; APreventRemoval: Boolean): Boolean;
    Function SizeToStr(Size: Int64): String;
    Function FileIconInit(FullInit: Boolean): Boolean; Stdcall;
  Public
    ImagesIconeUSBDrive: TImageList;
    DriveList:           TDriveList;
    Function EjectUSBDrive(Index: Integer): Boolean;
    Procedure GetUSBLogicalDriveLetter(cb: TComboBox);
    Constructor Create;
    Destructor Destroy; Override;
  End;
 
Var
  USBDrive: TUSBDrive;
 
Implementation
 
{ TUSBDrive }
 
Constructor TUSBDrive.Create;
Begin
  FSmall                           := GetSystemMetrics(SM_CXSMICON);
  ImagesIconeUSBDrive              := TImageList.CreateSize(FSmall, FSmall);
  ImagesIconeUSBDrive.DrawingStyle := dsTransparent;
  ImagesIconeUSBDrive.ShareImages  := True;
  DriveList                        := TDriveList.Create;
End;
 
Destructor TUSBDrive.Destroy;
Begin
  ImagesIconeUSBDrive.Free;
  DriveList.Free;
  Inherited;
End;
 
//foxi
Function TUSBDrive.SizeToStr(Size: Int64): String;
Begin
  If Size < $000000000400 Then
    Result := format('%d bytes', [Size])
  Else
  If Size < $000000100000 Then
    Result := format('%.1f Kb', [Size / $000000000400])
  Else
  If Size < $000040000000 Then
    Result := format('%.1f Mb', [Size / $000000100000])
  Else
  If Size < $010000000000 Then
    Result := format('%.2f Gb', [Size / $000040000000])
  Else
    Result := format('%.2f Tb', [Size / $010000000000]);
End;
 
Function TUSBDrive.FormatSize(FreeSpace, Size: String): String;
Begin
  Result := format(' (libre : %0:s, total : %1:s)', [SizeToStr(StrToInt64(FreeSpace)), SizeToStr(StrToInt64(Size))]);
End;
 
//déconnecter un lecteur par sa lettre
 
 //http://support.microsoft.com/kb/165721/fr
 //http://efreedom.com/Question/1-434688/Can-Remove-USB-Flash-Disk-Programmatically-Using-Delphi
 //http://stackoverflow.com/questions/434688/how-can-i-remove-a-usb-flash-disk-programmatically-using-delphi
Function TUSBDrive.OpenVolume(ADrive: Char): THandle;
Var
  RootName, VolumeName: String;
  AccessFlags:          DWORD;
Begin
  RootName := ADrive + ':\\'; // ADrive + ':\' kills the syntax highlighting
  Case GetDriveType(PChar(RootName)) Of
    DRIVE_REMOVABLE, DRIVE_FIXED: // DRIVE_FIXED needed for usb hardrive
      AccessFlags := GENERIC_READ Or GENERIC_WRITE;
    DRIVE_CDROM:
      AccessFlags := GENERIC_READ;
    Else
      Result := INVALID_HANDLE_VALUE;
      exit;
  End;
  VolumeName := Format('\\.\%s:', [ADrive]);
  Result     := CreateFile(PChar(VolumeName), AccessFlags, FILE_SHARE_READ Or FILE_SHARE_WRITE, NIL, OPEN_EXISTING, 0, 0);
  If Result = INVALID_HANDLE_VALUE Then
    RaiseLastOSError;
End;
 
Function TUSBDrive.LockVolume(AVolumeHandle: THandle): Boolean;
Const
  LOCK_TIMEOUT = 10 * 1000; // 10 Seconds
  LOCK_RETRIES = 20;
  LOCK_SLEEP   = LOCK_TIMEOUT Div LOCK_RETRIES;
 
  // #define FSCTL_LOCK_VOLUME CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 6, METHOD_BUFFERED, FILE_ANY_ACCESS)
  FSCTL_LOCK_VOLUME = (9 Shl 16) Or (0 Shl 14) Or (6 Shl 2) Or 0;
Var
  Retries:       Integer;
  BytesReturned: Cardinal;
Begin
  For Retries := 1 To LOCK_RETRIES Do
  Begin
    Result := DeviceIoControl(AVolumeHandle, FSCTL_LOCK_VOLUME, NIL, 0, NIL, 0, BytesReturned, NIL);
    If Result Then
      break;
    Sleep(LOCK_SLEEP);
  End;
End;
 
Function TUSBDrive.DismountVolume(AVolumeHandle: THandle): Boolean;
Const
  // #define FSCTL_DISMOUNT_VOLUME CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 8, METHOD_BUFFERED, FILE_ANY_ACCESS)
  FSCTL_DISMOUNT_VOLUME = (9 Shl 16) Or (0 Shl 14) Or (8 Shl 2) Or 0;
Var
  BytesReturned: Cardinal;
Begin
  Result := DeviceIoControl(AVolumeHandle, FSCTL_DISMOUNT_VOLUME, NIL, 0, NIL, 0, BytesReturned, NIL);
  If Not Result Then
    RaiseLastOSError;
End;
 
Function TUSBDrive.PreventRemovalOfVolume(AVolumeHandle: THandle; APreventRemoval: Boolean): Boolean;
Const
  // #define IOCTL_STORAGE_MEDIA_REMOVAL CTL_CODE(IOCTL_STORAGE_BASE, 0x0201, METHOD_BUFFERED, FILE_READ_ACCESS)
  IOCTL_STORAGE_MEDIA_REMOVAL = ($2d Shl 16) Or (1 Shl 14) Or ($201 Shl 2) Or 0;
Type
  TPreventMediaRemoval = Record
    PreventMediaRemoval: BOOL;
  End;
Var
  BytesReturned: Cardinal;
  PMRBuffer:     TPreventMediaRemoval;
Begin
  PMRBuffer.PreventMediaRemoval := APreventRemoval;
  Result                        := DeviceIoControl(AVolumeHandle, IOCTL_STORAGE_MEDIA_REMOVAL, @PMRBuffer,
    SizeOf(TPreventMediaRemoval), NIL, 0, BytesReturned, NIL);
  If Not Result Then
    RaiseLastOSError;
End;
 
Function TUSBDrive.AutoEjectVolume(AVolumeHandle: THandle): Boolean;
Const
  // #define IOCTL_STORAGE_EJECT_MEDIA CTL_CODE(IOCTL_STORAGE_BASE, 0x0202, METHOD_BUFFERED, FILE_READ_ACCESS)
  IOCTL_STORAGE_EJECT_MEDIA = ($2d Shl 16) Or (1 Shl 14) Or ($202 Shl 2) Or 0;
Var
  BytesReturned: Cardinal;
Begin
  Result := DeviceIoControl(AVolumeHandle, IOCTL_STORAGE_EJECT_MEDIA, NIL, 0, NIL, 0, BytesReturned, NIL);
  If Not Result Then
    RaiseLastOSError;
End;
 
Function TUSBDrive.EjectVolume(ADrive: Char): Boolean;
Var
  VolumeHandle: THandle;
Begin
  Result       := False;
  // Open the volume
  VolumeHandle := OpenVolume(ADrive);
  If VolumeHandle = INVALID_HANDLE_VALUE Then
    exit;
  Try
    // Lock and dismount the volume
    If LockVolume(VolumeHandle) And DismountVolume(VolumeHandle) Then
    Begin
      // Set prevent removal to false and eject the volume
      If PreventRemovalOfVolume(VolumeHandle, False) Then
        AutoEjectVolume(VolumeHandle);
    End;
  Finally
    // Close the volume so other processes can use the dr
    CloseHandle(VolumeHandle);
  End;
End;
 
Function TUSBDrive.FileIconInit(FullInit: Boolean): Boolean; Stdcall;
Type
  TFileIconInit = Function(FullInit: Boolean): Boolean; Stdcall;
Var
  ShellDLL:      HMODULE;
  PFileIconInit: TFileIconInit;
Begin
  Result := False;
  If (Win32Platform = VER_PLATFORM_WIN32_NT) Then
  Begin
    ShellDLL      := LoadLibrary(PChar('shell32.dll'));
    PFileIconInit := GetProcAddress(ShellDLL, PChar(660));
    If (Assigned(PFileIconInit)) Then
      Result := PFileIconInit(FullInit);
  End;
End;
 
Function TUSBDrive.EjectUSBDrive(Index: Integer): Boolean;
Begin
  If Not Index In [0..DriveList.Count - 1] Then
    Raise Exception.Create('Index not found in DriveList');
 
  Result := EjectVolume(DriveList.Items[Index].Drive);
End;
 
// récuperer liste lecteur USB clef et disque dure
 
 // ==============================================================================
 // == Eric Boisvert http://www.developpez.net/forums/u18010/eric-boisvert/
 // ==
 // == Obtien la lettre associée d'un Numéro de disque physique via WMI
 // == source des requêtes WMI dans cette fonction
 // ==  http://msdn2.microsoft.com/en-us/library/aa394592.aspx
 // == L'avantage d'utilisé OLE Atomation avec WMI, c'est que la syntax
 // == Delphi devient semblable à du VBScript...
 // == et il exsite beaucoup d'exemple en VBScript.
 // ==
 // == use urlMon,ActiveX,ComObj
 // ==============================================================================
 
Procedure TUSBDrive.GetUSBLogicalDriveLetter(cb: TComboBox);
Var
  // == Moniker stuff ==
  hr:                                HResult;
  wsWMIConnectionStr:                WideString;
  oBindCtx:                          IBindCtx;  // BindContext
  oIMoniker:                         IMoniker;  // IMoniker interface
  oIDispatch:                        IDispatch; // WMI connection
  oleWMI:                            Olevariant;
  oDisks, oDisk:                     Olevariant;   // Objet Disks (physique)
  oPartitions, oPartition:           Olevariant;   // Objets Partitions
  oLogicalDisks, oLogicalDisk:       Olevariant;   // Objets LogicalDisk
  oEnumDisk, oEnumPart, oEnumVolume: IEnumvariant; // Ennumerations
  ulParsed:                          ULONG;
  sDiskPhysique:                     String;
  sPartition:                        String;
  sDiskLogique:                      String;
  query:                             String;
  Info:                              TSHFileInfo;
  sLogicalDiskID:                    String;
Begin
  // == Utilise WMI a travers OLE et une Session Moniker...
  // == Source http://msdn2.microsoft.com/en-us/library/aa383539.aspx
  // ==        http://msdn2.microsoft.com/en-us/library/aa389763.aspx
  // ==        http://msdn2.microsoft.com/en-us/library/ms221192.aspx
  // == Initialise les objets COM ==
  CoInitialize(NIL);
  sDiskLogique := '';
  cb.Items.Clear;
  DriveList.Clear;
  Try
    // == on récupère les icônes
    FileIconInit(True);
    ImagesIconeUSBDrive.Handle      := SHGetFileInfo('', 0, Info, SizeOf(TSHFileInfo), SHGFI_SYSICONINDEX Or SHGFI_SMALLICON);
    ImagesIconeUSBDrive.ShareImages := True;
    // == DEBUT Equivalent à GetObject de VBScript via OLE ==
    // == voir: http://support.microsoft.com/kb/122288 ==
    // == Obtient un bind Context ==
    hr                              := CreateBindCtx(0, oBindCtx);
    If hr <> 0 Then
      OleCheck(hr);
    // == Obtient IMoniker interface  ==
    wsWMIConnectionStr := 'winmgmts:\\.\root\cimv2';
    hr                 := MkParseDisplayNameEx(oBindCtx, PWideChar(wsWMIConnectionStr), ulParsed, oIMoniker);
    If hr <> 0 Then
      OleCheck(hr);
    // == Obtient un objet WMI  ==
    hr := oIMoniker.BindToObject(oBindCtx, NIL, IUnknown, oIDispatch);
    If hr <> 0 Then
      OleCheck(hr);
    oleWMI := oIDispatch;
    // == FIN Equivalent à GetObject de VBScript ==
 
    // == Trouve tous les disques Physiques branché en USB ==
    query     := 'SELECT DeviceID FROM Win32_DiskDrive WHERE InterfaceType = ''USB''';
    oDisks    := oleWMI.ExecQuery(query);
    oEnumDisk := IUnknown(oDisks._NewEnum) As IEnumvariant;
    While oEnumDisk.Next(1, oDisk, ulParsed) = 0 Do
    Begin
      sDiskPhysique := oDisk.DeviceID;
      // == Pour chaque disque, trouve toutes les partitions ==
      query         := 'ASSOCIATORS OF {Win32_DiskDrive.DeviceID=''';
      query         := query + sDiskPhysique;
      query         := query + '''} WHERE AssocClass = Win32_DiskDriveToDiskPartition';
      oPartitions   := oleWMI.ExecQuery(query);
      oEnumPart     := IUnknown(oPartitions._NewEnum) As IEnumvariant;
      While oEnumPart.Next(1, oPartition, ulParsed) = 0 Do
      Begin
        sPartition    := oPartition.DeviceID;
        // == Pour chaque partition, Trouve les Disques Logiques (lettre) ==
        query         := 'ASSOCIATORS OF {Win32_DiskPartition.DeviceID="';
        query         := query + sPartition;
        query         := query + '"} WHERE AssocClass = Win32_LogicalDiskToPartition';
        oLogicalDisks := oleWMI.ExecQuery(query);
        oEnumVolume   := IUnknown(oLogicalDisks._NewEnum) As IEnumvariant;
        While oEnumVolume.Next(1, oLogicalDisk, ulParsed) = 0 Do
        Begin
          // == Accumule les index d'icônes, lettres, nom, taille associées au disque logique ==
          sLogicalDiskID := String(oLogicalDisk.DeviceID) + '\';
          SHGetFileInfo(PChar(sLogicalDiskID), 0, Info, SizeOf(TSHFileInfo), SHGFI_SYSICONINDEX Or SHGFI_SMALLICON);
          cb.Items.AddObject('(' + oLogicalDisk.DeviceID + ') ' + oLogicalDisk.VolumeName + FormatSize(
            oLogicalDisk.FreeSpace, oLogicalDisk.Size), TObject(Info.iIcon));
          // == rempli notre liste
          DriveList.AddDrive(sLogicalDiskID[1], sDiskPhysique, oLogicalDisk.VolumeName,
            StrToInt64(oLogicalDisk.FreeSpace), StrToInt64(oLogicalDisk.Size), Info.iIcon);
        End;
      End;
    End;
  Finally
    // == Liberatrion des objets COM ==
    CoUninitialize();
  End;
End;
 
{ TDrive }
 
Constructor TDrive.Create(ADrive: Char; ADiskPhysique, AVolumeName: String; AFreeSpace, ATotalSpace: Int64; AIdxIcone: Integer);
Begin
  Drive        := ADrive;
  DiskPhysique := ADiskPhysique;
  VolumeName   := AVolumeName;
  FreeSpace    := AFreeSpace;
  TotalSpace   := ATotalSpace;
  IdxIcone     := AIdxIcone;
End;
 
{ TDriveList }
 
Function TDriveList.AddDrive(ADrive: Char; ADiskPhysique, AVolumeName: String; AFreeSpace, ATotalSpace: Int64; AIdxIcone: Integer): Integer;
Begin
  Result := Inherited Add(TDrive.Create(ADrive, ADiskPhysique, AVolumeName, AFreeSpace, ATotalSpace, AIdxIcone));
End;
 
Procedure TDriveList.Clear;
Begin
  While Inherited Count > 0 Do
    Delete(0);
  Inherited;
End;
 
Procedure TDriveList.Delete(Index: Integer);
Begin
  If Not Index In [0..Count - 1] Then
    Exit;
 
  Items[Index].Free;
  Inherited Delete(Index);
End;
 
Destructor TDriveList.Destroy;
Begin
  Try
    Clear;
  Finally
    Inherited;
  End;
End;
 
Function TDriveList.GetItem(Index: Integer): TDrive;
Begin
  Result := TDrive(Inherited Items[Index]);
End;
 
Initialization
  USBDrive := TUSBDrive.Create;
 
Finalization
  USBDrive.Free;
 
End.

est-ce que quelqu'un a déjà réussi à le faire ici ? merci d'avance pour votre aide.

déconnection USB clef disque dure HUB WMI

API, COM et SDKs Delphi

Mode arborescent

Discussions similaires

Partager

Partager