From: Zach Dennis <zdennis@...>
Date: 2005-12-16T05:39:36+09:00
Subject: Re: [PATCH] Dir.tmpdir RDoc

nobuyoshi nakada wrote:
> Hi,
> 
> At Thu, 15 Dec 2005 12:01:22 +0900,
> Daniel Berger wrote in [ruby-core:06896]:
> 
>>Also, GetSystemWindowsDirectory() is deprecated on
>>Windows in favor of ShGetFolderPath().  From the MSDN
>>docs:
>>
>>"Applications should store code in the Program Files
>>folder and persistent data in the Application Data
>>folder in the user's profile."
> 
> 
> TEMP direcotry is defaulted to "%USERPROFILE%/Local
> Settings/Temp", but how can you tell USERPROFILE with that
> API?
> 

--- begin code for windows 2000 and xp ---
#include "windows.h"
#include "shlobj.h"

void main(){
   HINSTANCE hDll= LoadLibrary( "shell32.dll" );
   FARPROC proc;
   char cPath[256];

   if( hDll ){
     proc = GetProcAddress( hDll, "SHGetSpecialFolderPathA" );
     if( proc ){
       (proc)( NULL, cPath, CSIDL_PERSONAL, FALSE );
       printf( "user home directory is:\n   %s\n", cPath );
       printf( "user temp directory is:\n   %s\\Local Settings\\Temp", 
cPath );
     }
     else{
       printf( "Error calling function!\n" );
     }
   }
}

--- end code ---

The SHGetSpecialFolderPathA should really be "SHGetSpecialFolderPath" 
because windows is supposed to determine whether or not to call 
SHGetSpecialFolderPathA or SHGetSpecialFolderPathU (for ansii/unicode).

I have never seen that actually happen though, I have always had to use 
SHGetSpecialFolderPathA for it to work, but perhaps there just needs to 
be a macro used here.


--- begin code for windows 95, 98, 2000---

void main(){
   HINSTANCE hDll= LoadLibrary( "shell32.dll" );
   FARPROC proc;
   char cPath[256];

   if( hDll ){
     proc = GetProcAddress( hDll, "SHGetFolderPathA" );
     if( proc ){
       (proc)( NULL, CSIDL_PERSONAL, NULL, SHGFP_TYPE_CURRENT, cPath );
       printf( "user home directory is:\n   %s\n", cPath );
       printf( "user temp directory is:\n   %s\\Local Settings\\Temp", 
cPath );
     }
     else{
       printf( "Error calling function!\n" );
     }
   }
}
--- end code ---

The same rules apply to SHGetFolderPathA (in regards to calling the 
ansii/unicode version)  if i remember correctly.

There is no CSIDL_xxx value for the actual temporary directory, although 
you can find the current values at:
 
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/shell/reference/enums/csidl.asp

Information on SHGetFolderPath and SHGetSpecialFolderPath:

http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/reference/functions/shgetfolderpath.asp
http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/reference/functions/shgetspecialfolderpath.asp

I hope this helps,

Zach