Multi-files properties dialog? - Delphi

{ Copyright Kingron 2005 }
{ For Windows 2000 or Higher, Shell32.dll version 5.0 or later }

uses ActiveX, ShlObj, ComObj;

function SHMultiFileProperties(pDataObj: IDataObject; Flag: DWORD): HRESULT;
stdcall; external 'shell32.dll';

function GetFileListDataObject(Files: TStrings): IDataObject;
type
PArrayOfPItemIDList = ^TArrayOfPItemIDList;
TArrayOfPItemIDList = array[0..0] of PItemIDList;
var
Malloc: IMalloc;
Root: IShellFolder;
p: PArrayOfPItemIDList;
chEaten, dwAttributes: ULONG;
i, FileCount: Integer;
begin
Result := nil;
FileCount := Files.Count;
if FileCount = 0 then Exit;

OleCheck(SHGetMalloc(Malloc));
OleCheck(SHGetDesktopFolder(Root));
p := AllocMem(SizeOf(PItemIDList) * FileCount);
try
for i := 0 to FileCount - 1 do
try
if not (DirectoryExists(Files[i]) or FileExists(Files[i])) then Continue;
OleCheck(Root.ParseDisplayName(GetActiveWindow,
nil,
PWideChar(WideString(Files[i])),
chEaten,
p^[i],
dwAttributes));
except
end;
OleCheck(Root.GetUIObjectOf(GetActiveWindow,
FileCount,
p^[0],
IDataObject,
nil,
Pointer(Result)));
finally
for i := 0 to FileCount - 1 do
begin
if p^[i] <> nil then Malloc.Free(p^[i]);
end;
FreeMem(p);
end;
end;

procedure ShowFileProperties(Files: TStrings; aWnd: HWND);
type
PArrayOfPItemIDList = ^TArrayOfPItemIDList;
TArrayOfPItemIDList = array[0..0] of PItemIDList;
var
Data: IDataObject;
begin
if Files.Count = 0 then Exit;
Data := GetFileListDataObject(Files);
SHMultiFileProperties(Data, 0);
end;


// Example:
// Beispiel:

procedure TForm1.Button1Click(Sender: TObject);
begin
if OpenDialog1.Execute then
Memo1.Lines.AddStrings(OpenDialog1.Files);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
ShowFileProperties(Memo1.Lines, 0);
end;