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CSIDL_DRIVES?

Posted on 1998-09-18
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Last Modified: 2008-03-10
procedure Tdemarrage.programmesClick(Sender: TObject);
var
ppidl:PItemIDList;
Path:array[0..MAX_PATH] of char;
begin
     SHGetSpecialFolderLocation(Handle,CSIDL_DRIVES,ppidl);
     SHGetPathFromIDList(ppidl,Path);
     ShellExecute(Handle,'open',path,'','',SW_show);
end;

 CSIDL_DESKTOP,CSIDL_STARTMENU work but the other CSIDL_... doesn't.
Why?
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Question by:seb24
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2 Comments
 
LVL 20

Accepted Solution

by:
Madshi earned 150 total points
ID: 1340109
seb24,

SHGetPathFromIDList does only return path names like "c:\windows\desktop" or "e:\".
CSIDL_Drives is the "MyComputer" pidl. There's no "normal" path for it.

Regards, Madshi.

P.S: It seems that you've forgotten to free the pidl! Please add the following line add the end of your procedure:

  FreePidl(ppidl);

And the following procedure to your unit:

procedure FreePidl(var pidl: PItemIDList);
var malloc : IMalloc;
begin
  if (pidl<>nil) and (SHGetMalloc(malloc)=NOERROR) then begin
    malloc.Free(pidl);
    pidl:=nil;
  end;
end;

P.P.S: You can use the IShellFolder interface to get the display name of CSIDL_Drives (and other). But that can't be done in a few lines...
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LVL 20

Expert Comment

by:Madshi
ID: 1340110
P.P.P.P.P.P.S: With ShellExecuteEx you can execute the pidl returned from SHGetSpecialFolderLocation directly. Perhaps that works with ShellExecute, too. I don't know. If not, then look at ShellExecuteEx.
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