Calling SHGetSetSettings from Delphi

Question

I just read this question and this question, and since then I have been trying to call SHGetSetSettings in Delphi. This is a function of shell32.dll, but is not

Answer 1

The D2010 declaration of SHELLSTATE in ShlObj.pas is unfortunately incorrect, but the first group of bits (17) is correctly matched with Data: DWORD; (Yours is indeed OK). There could be 18 or 19 of them all the same. Then we should get 2 more DWORD/UINT for the 2 Win95unused, not only Data2.

Too bad because the SSF flags and SHGetSetSettings declarations are already done in there and correct.

The correct declaration according to MSDN should be IMO:

  tagSHELLSTATEW = record
    Data: DWORD;
{   fShowAllObjects: BOOL:1;
    fShowExtensions: BOOL:1;
    fNoConfirmRecycle: BOOL:1;
    fShowSysFiles: BOOL:1;
    fShowCompColor: BOOL:1;
    fDoubleClickInWebView: BOOL:1;
    fDesktopHTML: BOOL:1;
    fWin95Classic: BOOL:1;
    fDontPrettyPath: BOOL:1;
    fShowAttribCol: BOOL:1;
    fMapNetDrvBtn: BOOL:1;
    fShowInfoTip: BOOL:1;
    fHideIcons: BOOL:1;
    fWebView: BOOL:1;
    fFilter: BOOL:1;
    fShowSuperHidden: BOOL:1;
    fNoNetCrawling: BOOL:1;}

    dwWin95Unused: DWORD;// Win95 only - no longer supported pszHiddenFileExts
    uWin95Unused: UINT; // Win95 only - no longer supported cbHiddenFileExts

    // Note: Not a typo!  This is a persisted structure so we cannot use LPARAM
    lParamSort: Integer;
    iSortDirection: Integer;
    version: UINT;

    // new for win2k. need notUsed var to calc the right size of ie4 struct
    // FIELD_OFFSET does not work on bit fields
    uNotUsed: UINT;// feel free to rename and use}

    Data2: DWORD;
{   fSepProcess: BOOL:1;

    // new for Whistler.
    fStartPanelOn: BOOL:1;
    fShowStartPage: BOOL:1;

    // new for Windows Vista
    fAutoCheckSelect: BOOL:1;
    fIconsOnly: BOOL:1;
    fShowTypeOverlay: BOOL:1;

    // If you need a new flag, steal a bit from from fSpareFlags.
    // Also, keep SHELLFLAGSTATE and SHGetSettings in sync when adding new flags.
    fSpareFlag: UINT:13;}
  end;

You can verify that this allows to get the sorting properties correctly with:

var
  lpss: tagSHELLSTATEW;
begin
  ZeroMemory(@lpss, SizeOf(lpss));
  SHGetSetSettings(lpss, SSF_SORTCOLUMNS, False);