Solved

Finding the Windows Desktop Directory

Posted on 2000-03-09
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Last Modified: 2010-04-04
Is there a quick one-line way of finding the Windows Desktop Directory so that an application can save a file to it independent of directory structure. e.g. c:\windows\desktop, or c:\windows\users\frank\desktop etc..???

Looking for an answer asap on this so am prepared to offer 400 points for this one.
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Question by:gmnt
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Expert Comment

by:Lischke
ID: 2601039
Here's one solution. Not a one liner but short enough, I think:

function GetDesktopFolderName: String;

var
  AReg: TRegIniFile;

begin
  Result := '';
  AReg := TRegIniFile.Create('Software\MicroSoft\Windows\CurrentVersion\Explorer');
  Result := AReg.ReadString('Shell Folders', 'Desktop', '');
  AReg.Free;
end;


Ciao, Mike
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Expert Comment

by:Lischke
ID: 2601067
and here's another one:

function GetDesktopFolder: String;

var
  Buffer: array[0..MAX_PATH] of Char;
  PIDL: PItemIDList;

begin
  SHGetSpecialFolderLocation(Handle, CSIDL_DESKTOP, PIDL);
  SHGetPathFromIDList(PIDL, Buffer);
  Result := Buffer;
end;

Ciao, Mike
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Author Comment

by:gmnt
ID: 2601073
How does this react if, for example, the PC has multiple users and there are a number of desktop folders? Does it use the desktop of the currently active user i.e. the one actually logged in and running the application?
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Expert Comment

by:Lischke
ID: 2601082
Yep, the folder of the currently logged in user is returned.

Ciao, Mike
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Author Comment

by:gmnt
ID: 2601181
I think the first one is easier to understand - Are there any specifics I need e.g. in "uses" etc or just declare the function at the top?
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Expert Comment

by:Lischke
ID: 2601209
Nothing special to consider. Just take in Registry into the uses clause and copy the code out. Btw: the second code is not much harder than the first one. You need to include ShlObj and with this SHGet* stuff you are independent of eventual changes Microsoft makes to the registry in future Windows versions.

Ciao, Mike
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Author Comment

by:gmnt
ID: 2601334
I'm getting errors:
Undeclared identifier: 'Handle'
Unsatisfied forward or external declaration: 'TfrmMain.GetDesktopFolder'

I've included ShlObj and have declared the function with all the others:

procedure btnAboutClick(Sender: TObject);
procedure cmbSlot1Change(Sender: TObject);
function GetDesktopFolder: String;
private
      { Private declarations }

Any suggestions (btw using Delphi 4)
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Accepted Solution

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Lischke earned 400 total points
ID: 2601355
Oops, sorry. Replace Handle simply with 0. This was the handle of my TForm, but you don't need this value to pass.

Ciao, Mike
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Author Comment

by:gmnt
ID: 2601810
I needed an answer fast, and got it.
A nice quick and clean answer - much appreciated.
Garth.
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Expert Comment

by:Lischke
ID: 2601997
I'm always glad to help (in particular when so many points are involved ;-)).

Good luck until next time,

Ciao, Mike
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