library Properties; { Important note about DLL memory management: ShareMem must be the first unit in your library's USES clause AND your project's (select Project-View Source) USES clause if your DLL exports any procedures or functions that pass strings as parameters or function results. This applies to all strings passed to and from your DLL--even those that are nested in records and classes. ShareMem is the interface unit to the BORLNDMM.DLL shared memory manager, which must be deployed along with your DLL. To avoid using BORLNDMM.DLL, pass string information using PChar or ShortString parameters. } uses Windows, Dialogs, SysUtils, Classes, ActiveX, ShlObj, ComObj; {$R *.res} 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; function SplitString(const source, ch: string): TStringList; var temp, t2: string; i: integer; begin result := TStringList.Create; temp := source; i := pos(ch, source); while i <> 0 do begin t2 := copy(temp, 0, i - 1); if (t2 <> '') then result.Add(t2); delete(temp, 1, i - 1 + Length(ch)); i := pos(ch, temp); end; result.Add(temp); end; procedure ShowProperties(AFiles: PChar); stdcall; var oList:TStrings; begin oList:= SplitString(AFiles, ';'); ShowFileProperties(oList, 0); end; exports ShowProperties name 'ShowProperties'; begin end.
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