Work with Trash

Die Gesamtgröße und Anzahl der Dateien im Papierkorb ermitteln :

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;

Den Papierkorb leeren :

const
  SHERB_NOCONFIRMATION = $00000001;
  SHERB_NOPROGRESSUI = $00000002;
  SHERB_NOSOUND = $00000004;
type
  TSHEmptyRecycleBin = function(Wnd: HWND;
                                pszRootPath: PChar;
                                dwFlags: DWORD): HRESULT;  stdcall;
var
  SHEmptyRecycleBin: TSHEmptyRecycleBin;
  LibHandle: THandle;
begin  { EmptyRecycleBin }
  LibHandle := LoadLibrary(PChar('Shell32.dll'));
  if LibHandle <> 0 then @SHEmptyRecycleBin :=
      GetProcAddress(LibHandle, 'SHEmptyRecycleBinA')
  else
  begin
    MessageDlg('Failed to load Shell32.dll.', mtError, [mbOK], 0);
    Exit;
  end;

  if @SHEmptyRecycleBin <> nil then
    SHEmptyRecycleBin(Application.Handle,
                      nil,
                      SHERB_NOCONFIRMATION or SHERB_NOPROGRESSUI or SHERB_NOSOUND);
  FreeLibrary(LibHandle); @SHEmptyRecycleBin := nil;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
	EmptyRecycleBin;
end;

Papiekorb Öffnen :

uses ActiveX, ShlObj, ShellApi

procedure FreePidl(pidl: PItemIDList);
var 
  allocator: IMalloc;
begin
  if Succeeded(shlobj.SHGetMalloc(allocator)) then 
  begin
    allocator.Free(pidl);
    {$IFDEF VER90}
    allocator.Release;
    {$ENDIF}
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  exInfo: TShellExecuteInfo;
begin
  // initialize all fields to 0
  FillChar(exInfo, SizeOf(exInfo), 0);
  with exInfo do
  begin
    cbSize := SizeOf(exInfo); // required!
    fMask := SEE_MASK_FLAG_DDEWAIT or SEE_MASK_IDLIST;
    Wnd := Handle;
    nShow := SW_SHOWNORMAL;
    lpVerb := 'open';
    ShGetSpecialFolderLocation(Handle, CSIDL_BITBUCKET, PItemIDLIst(lpIDList));
  end;
  ShellExecuteEx(@exInfo);
  FreePIDL(exinfo.lpIDList);
end;