Delphi SHMultiFileProperties查看多个文件属性

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.