What is the best way to find out where notepad.exe and mspaint.exe are that will work across various versions of Windows?
Should I get the Windows directory via SHGetFolderPath(NULL, CSIDL_WINDOWS, NULL, SHGFP_TYPE_CURRENT, dir), and then traverse through all the subdirectories to look for the two files?
(Assume that I am not interested in anything outside the Windows folder.)
This works on every Windows box I've got access to (XP+).
c:\> for %i in (cmd.exe) do @echo %~$PATH:i
C:\WINDOWS\system32\cmd.exe
c:\> for %i in (python.exe) do @echo %~$PATH:i
C:\Python25\python.exe
The great thing is, you don't have to use the actual %PATH%, you can substitute your own search path by using a different environment variable.
If you have the Microsoft Platform SDK installed (the February 2003 version is the last one that works with Microsoft VC6), you can grab the where.exe program (it's 38K, only 18K if you gzip it) and run
where notepad.exe
help from the where command:
WHERE [/R dir] [/Q] [/F] [/T] pattern...
Description:
Displays the location of files that match the search pattern.
By default, the search is done along the current directory and
in the paths specified by the PATH environment variable.
Parameter List:
/R Recursively searches and displays the files that match the
given pattern starting from the specified directory.
/Q Returns only the exit code, without displaying the list
of matched files. (quite mode)
/F Displays the matched filename in double quotes.
/T Displays the file size, last modified date and time for all
matched files.
pattern Specifies the search pattern for the files to match.
Wildcards * and ? can be used in the pattern. The
"$env:pattern" and "path:pattern" formats can also be
specified, where "env" is an environment variable and
the search is done in the specified paths of the "env"
environment variable. These formats should not be used
with /R. The search is also done by appending the
extensions of the PATHEXT variable to the pattern.
/? Displays this help message.
NOTE: The tool returns an error level of 0 if the search is
successful, of 1 if the search is unsuccessful and
of 2 for failures or errors.
Examples:
WHERE /?
WHERE myfilename1 myfile????.*
WHERE $windir:*.*
WHERE /R c:\windows *.exe *.dll *.bat
WHERE /Q ??.???
WHERE "c:\windows;c:\windows\system32:*.dll"
WHERE /F /T *.dll
Check if the key HKEY_CLASSES_ROOT\Applications\notepad.exe is the same on localized versions. Maybe the key name is same and the value for edit/open points to the localized exe.
Example:
English:
HKEY_CLASSES_ROOT\Applications\notepad.exe\shell\edit\command
%SystemRoot%\system32**NOTEPAD.EXE** %1
Dutch:
HKEY_CLASSES_ROOT\Applications\notepad.exe\shell\edit\command
%SystemRoot%\system32**kladblok.exe** %1
If thats the case, then its just about to check the registry for that key (same goes for the mspaint).
Type:
%windir%\system32\notepad.exe
in the path bar thingy.
Or
C:\Windows\System32
and find notepad.exe. C is the hard drive where your OS is located.
I think to start off small you should get the windir environment variable and look in the subfolders %windir%\system32\ for mspaint and notepad.
Most likely they will be there.
However if that fails, well then resort to a more brute force search.
Normally, you would just execute them. They are on the system path in every version of Windows.
You can use ExpandEnvironmentStrings. The environment variable you want to expand is WINDIR.
In the past you could have used GetWindowsDirectory or GetSystemDirectory, but I think they are deprecated.
Use the WinAPI function GetWindowsDirectory() to get the Windows folder, and GetSystemDirectory() to get the Windows\System folder. Thely're guaranteed to work with all Windows versions since at least Win95; I think they were available in Win 3.x as well.
Since you tagged the question with WinAPI, I'd use SearchPath() e.g. the following will populate the variable path with the result.
//Get the full path to notepad
char path[MAX_PATH] = { 0 };
LPSTR* ptr = NULL;
DWORD dwRet = SearchPath(NULL, "notepad.exe", NULL, MAX_PATH, (LPSTR)path, ptr);
In short I find that the best approach
is to check the
Windows\System32 directory
and the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths registry keys.
More generally I find that the best approach
is to mimic ShellExecuteEx.
Taken from:
Application Registration (Windows)
https://msdn.microsoft.com/en-us/library/windows/desktop/ee872121(v=vs.85).aspx
The file is sought in the following locations:
•The current working directory.
•The Windows directory only (no subdirectories are searched).
•The Windows\System32 directory.
•Directories listed in the PATH environment variable.
•Recommended: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths
A further possibly is to check Start Menu\Programs\Accessories,
by using SHGetFolderPath with CSIDL_STARTMENU := 11
and CSIDL_COMMON_STARTMENU := 22, and retrieve the targets
from the lnk files.
Try opening a DOS prompt, change to the Windows folder and do:
dir notepad.exe /s
Long live DOS :)
