Description
Recently, an acquaintance noticed that FindExecutable doesn't always work, in
particular with certain 5-letter file extensions. He needed a way to find the
associated executable for these, and another acquaintance suggested using the
AssocQueryString API. It wasn't one I was very familiar with, but I quickly
became so when I took a look at the sorts of information it can provide. Here's
an example of what this sample gives you for any given extension / verb
combination:
The core of this project is a drop-in ready class you can just instantiate
and pass the desired extension to. The CAssociations class uses "open" as the
default verb, but you can provide anything you'd like. It's actually a very nice
way to determine whether a verb, like "print", is supported at all.
One problem with AssocQueryString is that on older operating systems (NT4, 98, 95),
it isn't available unless Internet Explorer 5 (or higher) is installed. The
class automatically tests for this, to avoid triggering an error, by looking to
see if the function is exported from the shwapi dynamic link library.
Published
This sample, or the one from which it originally derived, was published (or at least
peripherally mentioned) in the following article(s):
APIs Usage
This sample uses the following API calls:
| Module |
Library |
Function |
| CAssociations.cls |
kernel32
shlwapi |
FreeLibrary
GetModuleHandle
GetProcAddress
GetShortPathName
LoadLibrary
AssocQueryString |
Don't see what you're looking for? Here's a
complete API cross-reference.
Download
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Please, enjoy and learn from this sample. Include its code within your own projects, if you wish. But, in order to insure only the most recent code is available to all, I ask that you
don't share the sample by any form of mass distribution.
Download Assoc.zip,
6Kb, Last Updated: Thursday, September 24, 2009
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See Also
The following resources may also be of interest:
- Which - Finds first or all executables on path, or which executable is associated with a document file or extension.
- Which - Finds first or all executables on path, or which executable is associated with a document file or extension.
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