mfc, [Visual C++] File Associations with RegOpenKeyEx ...

Hello,

Here is my problem : i try to create a file associations class. When i
use it like that, it works, but not perfectly :

HKEY_CLASSES_ROOT
.myext
(default) REG_SZ MyProgFiles

HKEY_CLASSES_ROOT
MyProgFiles
(default)
DefaultIcon REG_SZ c:\program files\myapp\MyProg.exe,0
shell
open
command
(default) REG_SZ "c:\program
files\myapp\MyProg.exe" "%1"

This works with many file extensions, but when i try to associate it
with .bmp extension, even with those settings, and when i double click on a
.bmp file, the default windows XP picture viewer is launched, and not my
program.

Any idea ?

PixelDady