Delphi - Get file information

There is a very nice Shell API function which can be used to retrieve the icon of a file or folder (ShGetFileInfo). In combination with the FindFirst function of Delphi you can create a very useful function which returns all information about a given file. Following scGetFileInfo function returns a record-type with all properties of the file.

Example

type
  TFileInfo = record
    Icon : hIcon;
    Image : Integer;
    DisplayName : String;
    TypeName : String;
    Size : Integer;
    SizeDescription : String;
    DateTime : TDateTime;
    AttrArchive : Boolean;
    AttrReadOnly : Boolean;
    AttrSystem : Boolean;
    AttrHidden : Boolean;
    AttrVolume : Boolean;
    AttrDirectory : Boolean;
  end;

// ----------------------------------------------------------------
// Return string with formatted file size (bytes, Kb, Mb or Gb)
// ----------------------------------------------------------------
function scGetSizeDescription(const IntSize : Int64) : String;
begin
  if IntSize < 1024 then
    Result := IntToStr(IntSize)+' bytes'
  else
  begin
    if IntSize < (1024 * 1024) then
      Result := FormatFloat('####0.##',IntSize / 1024)+' Kb'
    else
      if IntSize < (1024 * 1024 * 1024) then
        Result := FormatFloat('####0.##',IntSize / 1024 / 1024)+' Mb'
      else
        Result := FormatFloat('####0.##',IntSize / 1024 / 1024 / 1024)+' Gb';
  end;
end;

// ----------------------------------------------------------------
// Return record with all information about given file
// How to use icon : ImageFile.Picture.Icon.Handle:=Info.Icon;
// ----------------------------------------------------------------
procedure scGetFileInfo(StrPath : String; var Info : TFileInfo);
var
  SHFileInfo : TSHFileInfo;
  SearchRec : TSearchRec;
begin
  if Trim(StrPath) = '' then
    Exit;

  ShGetFileInfo(PChar(StrPath), 0, SHFileInfo, SizeOf (TSHFileInfo),
    SHGFI_TYPENAME or SHGFI_DISPLAYNAME or SHGFI_SYSICONINDEX or SHGFI_ICON);

  with Info do
  begin
    Icon  := SHFileInfo.hIcon;
    Image := SHFileInfo.iIcon;
    DisplayName := SHFileInfo.szDisplayName;
    TypeName := SHFileInfo.szTypeName;
  end;

  FindFirst(StrPath, 0, SearchRec);
  with Info do
  begin
    try
      DateTime := FileDateToDateTime(SearchRec.Time);
    except
      DateTime := Now();
    end;

    AttrReadOnly := ((SearchRec.Attr and faReadOnly) > 0);
    AttrSystem := ((SearchRec.Attr and faSysFile) > 0);
    AttrHidden := ((SearchRec.Attr and faHidden) > 0);
    AttrArchive := ((SearchRec.Attr and faArchive) > 0);
    AttrVolume := ((SearchRec.Attr and faVolumeID) > 0);
    AttrDirectory := ((SearchRec.Attr and faDirectory) > 0);

    Size := SearchRec.Size;

    SizeDescription := scGetSizeDescription(Size);
  end;
end;