DLLs in c:\windows\system32

[Paul Breeuwsma <gtkmm paulinternet nl>]

Hi. I created a windows application which uses gtkmm as GUI. My compiler 
is mingw. I downloaded a developer environment of gtkmm at 
http://www.pcpm.ucl.ac.be/~gustin/win32_ports/gtkmm.html. I let the 
users of my app download and install the runtime environment which is 
located the same page. My app is only a exe which doens't need to be 
installed.

For most users my app works fine, but some people get error messages 
like "The procedure entry point atk_relation_add_target could no be 
located in the dynamic link library libatk-1.0-0.dll".

The cause of this problem is that there are two dll files of a different 
version. One file is c:\gtk\bin\libatk-1.0-0.dll, the other is 
c:\windows\system32\libatk-1.0-0.dll. The first file is installed by the 
runtime environment. The second by an other application. My app finds 
the one in system32, but it needs the one in c:\gtk\bin.

A temporary solution is to delete or rename the files in 
c:\windows\system32, but then some other gtk application doens't work. 
And I don't expect my users to mess in system directories. Noobs must be 
able to use my app.

Is it possible that someone changes the software that way that my app 
looks in the windows 
registry(HKEY_LOCAL_MACHINE\SOFTWARE\gtkmm\2.4\Path) where gtkmm is 
installed and uses that dll files, instead of letting windows search for 
them? An other advantage of that method is that c:\gtk\bin doesn't need 
to be in the windows path variable.

If that is not possible, is there an other solution for my problem?
You can download my app at 
http://www.gtagarage.com/mods/show.php?id=811. The comments of the users 
are also available there.

Thanks in advance.