Windows

Code:

{©Drkb v.3}

// Функция восстанавливает выбранный в ListView элемент из корзины...

function RestoreElement(const AHandle: THandle; LV: TListView): Boolean;

function GetLVItemText(const Index: Integer): String;

begin

   if Index = 0 then

     Result := LV.Selected.Caption

   else

     Result := LV.Selected.SubItems.Strings[Index - 1];

end;

var

ppidl, Item: PItemIDList;

Desktop: IShellFolder;

RecycleBin: IShellFolder2;

RecycleBinEnum: IEnumIDList;

Fetched, I: Cardinal;

Details: TShellDetails;

Mallok: IMalloc;

Valid: Boolean;

Context: IContextMenu;

AInvokeCommand: TCMInvokeCommandInfo;

begin

Result := False;

if LV = nil then Exit;

if SHGetMalloc(Mallok) = S_OK then

   if SHGetSpecialFolderLocation(AHandle, CSIDL_BITBUCKET, ppidl) = S_OK then

     if SHGetDesktopFolder(Desktop) = S_OK then

       if Desktop.BindToObject(ppidl, nil, IID_IShellFolder2, RecycleBin) = S_OK then

         if RecycleBin.EnumObjects(AHandle,

           SHCONTF_FOLDERS or SHCONTF_NONFOLDERS or SHCONTF_INCLUDEHIDDEN, RecycleBinEnum) = S_OK  then

         begin

           // Перечиляем содержимое корзины

           while True do

           begin

             RecycleBinEnum.Next(1, Item, Fetched);

             if Fetched = 0 then Break;

             Valid := False;

             for I := 0 to DETAIL_COUNT - 1 do

               if RecycleBin.GetDetailsOf(Item, I, Details) = S_OK then

               try

                 // Ищем нужный нам элемент

                 Valid := GetLVItemText(I) = StrRetToString(Item, Details.str);

                 if not Valid then Break;

               finally

                 Mallok.Free(Details.str.pOleStr);

               end;

             // Если выделенный элемент найден

             if Valid then

             begin

               // Восстанавливаем его при помощи интерфейса IContextMenu

               if RecycleBin.GetUIObjectOf(AHandle, 1, Item,

                 IID_IContextMenu, nil, Pointer(Context)) = S_OK then

               begin

                 FillMemory(@AInvokeCommand, SizeOf(AInvokeCommand), 0);

                 with AInvokeCommand do

                 begin

                   cbSize := SizeOf(AInvokeCommand);

                   hwnd := AHandle;

                   // - локализация не нужна...

                   lpVerb := 'undelete'; // - восстановление фийла из корзины...

                   //lpVerb := 'properties'; // - показ диалога свойства...

                   //lpVerb := 'delete'; // - удаление файла из корзины...

                   fMask := 0;

                   lpDirectory := PChar(LV.Selected.SubItems.Strings[0]);

                   nShow := SW_SHOWNORMAL;

                 end;

                 Result := Context.InvokeCommand(AInvokeCommand) = S_OK;

                 Break;

               end;

             end;

           end;

         end;

end;

procedure TForm1.mnuRestoreClick(Sender: TObject);

begin

if ListView1.Selected <> nil then

   if RestoreElement(Handle, ListView1) then ShowMessage('Элемент успешно восстановлен.');

end;

Code:

unit Unit1;

{©Drkb v.3}

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls, ShellAPI;

const

SHERB_NOCONFIRMATION  =  $1;

SHERB_NOPROGRESSUI    =  $2;

SHERB_NOSOUND         =  $4;

type

TForm1 = class(TForm)

   btnGetRecicleBinFileCount: TButton;

   btnEmptyRecicleBin: TButton;

   btnDelToReciclebin: TButton;

   procedure btnGetRecicleBinFileCountClick(Sender: TObject);

   procedure btnEmptyRecicleBinClick(Sender: TObject);

   procedure btnDelToReciclebinClick(Sender: TObject);

end;

type

  TSHQueryRBInfo = packed record

    cbSize      : DWORD;

    i64Size,

    i64NumItems : TLargeInteger;

  end;

  PSHQueryRBInfo = ^TSHQueryRBInfo;

function SHEmptyRecycleBin(hwnd: HWND; pszRootPath: PChar;

   dwFlags: DWORD): HRESULT; stdcall;

   external 'shell32.dll' name 'SHEmptyRecycleBinA';

function SHQueryRecycleBin (pszRootPath: PChar;

   var SHQueryRBInfo: TSHQueryRBInfo): HRESULT; stdcall;

   external 'Shell32.dll' name 'SHQueryRecycleBinA'; 

var

Form1: TForm1;

implementation

{$R *.dfm}

// Удаление файла в корзину...

procedure TForm1.btnDelToReciclebinClick(Sender: TObject);

var

Struct: TSHFileOpStruct;

Err: HRESULT;

begin

with Struct do

begin

   Wnd := Handle;

   wFunc := FO_DELETE;

   pFrom := 'c:\1.txt';

   pTo := nil;

   fFlags := FOF_ALLOWUNDO;

   fAnyOperationsAborted := True;

   hNameMappings := nil;

   lpszProgressTitle := nil;

end;

Err := SHFileOperation(Struct);

if Err <> S_OK then ShowMessage(SysErrorMessage(Err));

end;

end.

Code:

type

PSHQueryRBInfo = ^TSHQueryRBInfo;

TSHQueryRBInfo = packed record

   cbSize: DWORD;

   // Size of the structure, in bytes.

   // This member must be filled in prior to calling the function.

   i64Size: Int64;

   // Total size of all the objects in the specified Recycle Bin, in bytes.

   i64NumItems: Int64;

   // Total number of items in the specified Recycle Bin.

end;

const

shell32 = 'shell32.dll';

function SHQueryRecycleBin(szRootPath: PChar; SHQueryRBInfo: PSHQueryRBInfo): HResult;

stdcall; external shell32 Name 'SHQueryRecycleBinA';

function GetDllVersion(FileName: string): Integer;

var

InfoSize, Wnd: DWORD;

VerBuf: Pointer;

FI: PVSFixedFileInfo;

VerSize: DWORD;

begin

Result   := 0;

InfoSize := GetFileVersionInfoSize(PChar(FileName), Wnd);

if InfoSize <> 0 then

begin

   GetMem(VerBuf, InfoSize);

   try

     if GetFileVersionInfo(PChar(FileName), Wnd, InfoSize, VerBuf) then

       if VerQueryValue(VerBuf, '\', Pointer(FI), VerSize) then

         Result := FI.dwFileVersionMS;

   finally

     FreeMem(VerBuf);

   end;

end;

end;

procedure TForm1.Button1Click(Sender: TObject);

var

DllVersion: integer;

SHQueryRBInfo: TSHQueryRBInfo;

r: HResult;

begin

DllVersion := GetDllVersion(PChar(shell32));

if DllVersion >= $00040048 then

begin

   FillChar(SHQueryRBInfo, SizeOf(TSHQueryRBInfo), #0);

   SHQueryRBInfo.cbSize := SizeOf(TSHQueryRBInfo);

   R := SHQueryRecycleBin(nil, @SHQueryRBInfo);

   if r = s_OK then

   begin

     label1.Caption := Format('Size:%d Items:%d',

       [SHQueryRBInfo.i64Size, SHQueryRBInfo.i64NumItems]);

   end

   else

     label1.Caption := Format('Err:%x', [r]);

end;

end;

{

The SHQueryRecycleBin API used in this method is

only available on systems with the latest shell32.dll installed with IE4 /

Active Desktop.

}

Code:

unit Unit1;

{©Drkb v.3}

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls, ShellAPI;

const

SHERB_NOCONFIRMATION  =  $1;

SHERB_NOPROGRESSUI    =  $2;

SHERB_NOSOUND         =  $4;

type

TForm1 = class(TForm)

   btnGetRecicleBinFileCount: TButton;

   btnEmptyRecicleBin: TButton;

   btnDelToReciclebin: TButton;

   procedure btnGetRecicleBinFileCountClick(Sender: TObject);

   procedure btnEmptyRecicleBinClick(Sender: TObject);

   procedure btnDelToReciclebinClick(Sender: TObject);

end;

type

  TSHQueryRBInfo = packed record

    cbSize      : DWORD;

    i64Size,

    i64NumItems : TLargeInteger;

  end;

  PSHQueryRBInfo = ^TSHQueryRBInfo;

function SHEmptyRecycleBin(hwnd: HWND; pszRootPath: PChar;

   dwFlags: DWORD): HRESULT; stdcall;

   external 'shell32.dll' name 'SHEmptyRecycleBinA';

function SHQueryRecycleBin (pszRootPath: PChar;

   var SHQueryRBInfo: TSHQueryRBInfo): HRESULT; stdcall;

   external 'Shell32.dll' name 'SHQueryRecycleBinA'; 

var

Form1: TForm1;

implementation

{$R *.dfm}

// Очистка корзины

procedure TForm1.btnEmptyRecicleBinClick(Sender: TObject);

var

Err: HRESULT;

begin

Err := SHEmptyRecycleBin(Handle, 'c:\', SHERB_NOSOUND);

if Err <> S_OK then ShowMessage(SysErrorMessage(Err));

end;

end.

Code:

ExpandEnvironmentStrings( LPCTSTR lpSrc, LPTSTR lpDst, DWORD nSize );

Code:

unit Unit1;

{©Drkb v.3}

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls, ShellAPI, ShlObj, ActiveX, ComCtrls, Menus;

// корзина отображает не всю информацию по удаленному элементу

// а только 6 позиций.

// в действительности этих позиций больше...

const

DETAIL_COUNT = 11;

type

TForm1 = class(TForm)

   Button1: TButton;

   ListView1: TListView;

   PopupMenu1: TPopupMenu;

   mnuRestore: TMenuItem;

   procedure Button1Click(Sender: TObject);

   procedure mnuRestoreClick(Sender: TObject);

end;

var

Form1: TForm1;

implementation

{$R *.dfm}

// Функция взята из QDialogs...

function StrRetToString(PIDL: PItemIDList; StrRet: TStrRet;

Flag: String = ''): String;

var

P: PChar;

begin

case StrRet.uType of

   STRRET_CSTR:

     SetString(Result, StrRet.cStr, lStrLen(StrRet.cStr));

   STRRET_OFFSET:

     begin

       P := @PIDL.mkid.abID[StrRet.uOffset - SizeOf(PIDL.mkid.cb)];

       SetString(Result, P, PIDL.mkid.cb - StrRet.uOffset);

     end;

   STRRET_WSTR:

     if Assigned(StrRet.pOleStr) then

       Result := StrRet.pOleStr

     else

       Result := '';

end;

{ This is a hack bug fix to get around Windows Shell Controls returning

   spurious "?"s in date/time detail fields }

if (Length(Result) > 1) and (Result[1] = '?') and (Result[2] in ['0'..'9']) then

   Result := StringReplace(Result, '?', '', [rfReplaceAll]);

end;

// Смотрим содержимое корзины...

function ViewRecycleBin(const AHandle: THandle; LV: TListView): Boolean;

var

ppidl, Item: PItemIDList;

Desktop: IShellFolder;

RecycleBin: IShellFolder2;

RecycleBinEnum: IEnumIDList;

Fetched, I: Cardinal;

Details: TShellDetails;

Mallok: IMalloc;

TmpStr: ShortString;

begin

Result := False;

if LV = nil then Exit;

LV.Clear;

LV.Columns.Clear;

LV.ViewStyle := vsReport;

if SHGetMalloc(Mallok) = S_OK then

   if SHGetSpecialFolderLocation(AHandle, CSIDL_BITBUCKET, ppidl) = S_OK then

     if SHGetDesktopFolder(Desktop) = S_OK then

       if Desktop.BindToObject(ppidl, nil, IID_IShellFolder2, RecycleBin) = S_OK then

         if RecycleBin.EnumObjects(AHandle,

           SHCONTF_FOLDERS or SHCONTF_NONFOLDERS, RecycleBinEnum) = S_OK  then

         begin

           // Создаем колонки

           for I := 0 to DETAIL_COUNT - 1 do

             if RecycleBin.GetDetailsOf(nil, I, Details) = S_OK then

             try

               with LV.Columns.Add do

               begin

                 Caption := StrRetToString(Item, Details.str);

                 Width := LV.Canvas.TextWidth(Caption) + 24;

               end;

             finally

               Mallok.Free(Details.str.pOleStr);

             end;

           // Перечиляем содержимое корзины

           while True do

           begin

             RecycleBinEnum.Next(1, Item, Fetched);

             if Fetched = 0 then Break;

             if RecycleBin.GetDetailsOf(Item, 0, Details) = S_OK then

             begin

               try

                 TmpStr := StrRetToString(Item, Details.str);

               finally

                 Mallok.Free(Details.str.pOleStr);

               end;

               with LV.Items.Add do

               begin

                 Caption := TmpStr;

                 for I := 1 to DETAIL_COUNT - 1 do

                   if RecycleBin.GetDetailsOf(Item, I, Details) = S_OK then

                   try

                     SubItems.Add(StrRetToString(Item, Details.str));

                   finally

                     Mallok.Free(Details.str.pOleStr);

                   end;

               end;

             end;

           end;

           Result := True;

         end;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

ViewRecycleBin(Handle, ListView1);

end;     

end.

Code:

unit Unit1;

{©Drkb v.3}

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls, ShellAPI;

const

SHERB_NOCONFIRMATION  =  $1;

SHERB_NOPROGRESSUI    =  $2;

SHERB_NOSOUND         =  $4;

type

TForm1 = class(TForm)

   btnGetRecicleBinFileCount: TButton;

   btnEmptyRecicleBin: TButton;

   btnDelToReciclebin: TButton;

   procedure btnGetRecicleBinFileCountClick(Sender: TObject);

   procedure btnEmptyRecicleBinClick(Sender: TObject);

   procedure btnDelToReciclebinClick(Sender: TObject);

end;

type

  TSHQueryRBInfo = packed record

    cbSize      : DWORD;

    i64Size,

    i64NumItems : TLargeInteger;

  end;

  PSHQueryRBInfo = ^TSHQueryRBInfo;

function SHEmptyRecycleBin(hwnd: HWND; pszRootPath: PChar;

   dwFlags: DWORD): HRESULT; stdcall;

   external 'shell32.dll' name 'SHEmptyRecycleBinA';

function SHQueryRecycleBin (pszRootPath: PChar;

   var SHQueryRBInfo: TSHQueryRBInfo): HRESULT; stdcall;

   external 'Shell32.dll' name 'SHQueryRecycleBinA'; 

var

Form1: TForm1;

implementation

{$R *.dfm}

// Просмотр состояния корзины (краткая информация)

procedure TForm1.btnGetRecicleBinFileCountClick(Sender: TObject);

var

Info: TSHQueryRBInfo;

Err: HRESULT;

begin

ZeroMemory(@Info, SizeOf(Info));

Info.cbSize := SizeOf(Info);

Err := SHQueryRecycleBin(nil, Info);

if Err = S_OK then

   ShowMessage(Format('Всего в корзине %d эелементов, их общий размер: %d',

     [Info.i64NumItems, Info.i64Size]))

else

   ShowMessage(SysErrorMessage(Err));

end;

end.

Code:

procedure GetEnvironmentStrings(ss: TStrings);

{Переменные среды}

var

ptr: PChar;

s: string;

Done: boolean;

begin

ss.Clear;

s := '';

Done := FALSE;

ptr := windows.GetEnvironmentStrings;

while Done = false do begin

   if ptr^ = #0 then begin

     inc(ptr);

     if ptr^ = #0 then Done := TRUE

     else ss.Add(s);

     s := ptr^;

   end else s := s + ptr^;

   inc(ptr);

end;

end;