mfc, detect an executable

by **amlt** » Tue, 25 Jan 2005 00:45:11 GMT

Hi,
I need to find out whether a program is installed on my computer. Right now
I used CFileFind to search the exe recursively in the Program Files folder.
Is there any better way to do this in MFC?

Thanks a lot.
Jim

by **David Lowndes** » Tue, 25 Jan 2005 00:59:16 GMT

>I need to find out whether a program is installed on my computer. Right now

Jim,

There's nothing to say the program is installed beneath Program Files
so that may well not suffice.

You need to tell us some more about your problem.

Dave

by **amlt** » Tue, 25 Jan 2005 01:15:05 GMT

For example, I need to find whether I have winword.exe on my computer.
Right now, we assume it is installed in Program Files folder. we can search
the whole computer if we don't have this assumption. I am asking is there a
better way to find an exe on my computer?
Thanks a lot.
Jim

by **David Lowndes** » Tue, 25 Jan 2005 01:35:08 GMT

>For example, I need to find whether I have winword.exe on my computer.

Sorry to sound pedantic, but why? What's the real issue? Why do you
need to know it's there? Does it matter which version of winword is
available?

You could have winword.exe on the computer, but that doesn't mean it's
installed and functional.

A recursive search using CFileFind (FindFirstFile, etc) is the way to
look for a file.

Dave

by **Fredrik Wahlgren** » Tue, 25 Jan 2005 07:23:45 GMT

search
a

Try to create an instance of winword using CoCreateInstance.

/Fredrik

by **szuchymj** » Tue, 25 Jan 2005 07:35:17 GMT

You mean, is there some kind of database that contains only the
installed programs on your computer, that could be searched through
very quickly in comparison to the entire hard disk? I don't know.

If it does exist, it would not contain all applications, only the ones
in the Windows Add/Remove programs dialog. Is this similar to what you
had in mind?

by **Fredrik Wahlgren** » Tue, 25 Jan 2005 07:38:06 GMT

I mean that MS word is an application that can be started from COM. Only
some applications can be started this way. If it can, then it must be
installed. They may or may not appear in the Windows Add/Remove programs
dialog

/Fredrik

by **uwe.kotyczka** » Tue, 25 Jan 2005 19:13:59 GMT

In this special case you can ask the registry if Winword is installed.
All versions of MS Office (at least from Office95) generate a registry
key "Word.Basic" which tells you wheather or not Word is installed.

m_bIsWordInstalled = ProgIDExists(_T("Word.Basic"));

BOOL ProgIDExists(LPCTSTR szProgID)
{
BOOL bRet = FALSE;
HKEY hkey;

if (RegOpenKeyEx(HKEY_CLASSES_ROOT, szProgID, 0, KEY_READ, &hkey) ==
ERROR_SUCCESS)
{
bRet = TRUE;
RegCloseKey(hkey);
}

return bRet;
}

In a program of mine I save the contents of a RichEdit control to a
RichText file.
This usually contains some graphics and therefore the RichText file is
rather large.
However, converting it to .doc by Winword decreases the file size to
(about) 10% of
the original file size.
So my program first asks if Winword is installed (code above). If so, I
use Winword
as a server to convert the .rtf to .doc. Works like a charme.

HTH

by **Jerry Coffin** » Wed, 26 Jan 2005 12:42:40 GMT

In article < XXXX@XXXXX.COM >,
XXXX@XXXXX.COM says...

Reasonably speaking, my advice would be to create a file that would
normally be opened by the program you're looking for, and then call
FindExecutable on that file to see if it bears a reasonably strong
resemblance to what you're looking for. This will be a whole lot
faster and probably more accurate than trying to look for the
executable directly.

--
Later,
Jerry.

The universe is a figment of its own imagination.

by **Snow** » Wed, 26 Jan 2005 18:15:02 GMT

How about reading the registry location
"HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\APPPATHS"?

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