Here is the report of FileExtInfo about my .FLV (Flash Video format,
added with the excellent Vista Codec Package):


Code:
--------------------

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~
File association information for [.FLV] file type
Generated by FileExtInfo v2.0 on 06/10/2008 18.21.32
FileExtInfo © 2005-2007 Ramesh Srinivasan.
Homepage: http://www.winhelponline.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~

[HKEY_CLASSES_ROOT\.FLV]
@="flv_auto_file"
"Content Type"="video/x-flv"
"PerceivedType"="video"
[HKEY_CLASSES_ROOT\.FLV\ShellEx]
[HKEY_CLASSES_ROOT\.FLV\ShellEx\{BB2E617C-0920-11D1-9A0B-00C04FC2D6C1}]
@="{c5a40261-cd64-4ccf-84cb-c394da41d590}"

[HKEY_CLASSES_ROOT\flv_auto_file]
@=""
[HKEY_CLASSES_ROOT\flv_auto_file\shell]
@="Play"
[HKEY_CLASSES_ROOT\flv_auto_file\shell\open]
[HKEY_CLASSES_ROOT\flv_auto_file\shell\open\command]
@=hex(2):22,00,25,00,50,00,72,00,6f,00,67,00,72,00 ,61,00,6d,00,46,00,69,00,6c,\
00,65,00,73,00,25,00,5c,00,57,00,69,00,6e,00,64,00 ,6f,00,77,00,73,00,20,00,\
4d,00,65,00,64,00,69,00,61,00,20,00,50,00,6c,00,61 ,00,79,00,65,00,72,00,5c,\
00,77,00,6d,00,70,00,6c,00,61,00,79,00,65,00,72,00 ,2e,00,65,00,78,00,65,00,\
22,00,20,00,2f,00,4f,00,70,00,65,00,6e,00,20,00,22 ,00,25,00,4c,00,22,00,20,\
00,00,00
[HKEY_CLASSES_ROOT\flv_auto_file\shell\play]
@="&Play"
"MUIVerb"=hex(2):40,00,25,00,53,00,79,00,73,00,74, 00,65,00,6d,00,52,00,6f,00,\
6f,00,74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65 ,00,6d,00,33,00,32,00,5c,\
00,75,00,6e,00,72,00,65,00,67,00,6d,00,70,00,32,00 ,2e,00,65,00,78,00,65,00,\
2c,00,2d,00,39,00,39,00,39,00,31,00,00,00
[HKEY_CLASSES_ROOT\flv_auto_file\shell\play\command]
@=hex(2):22,00,25,00,50,00,72,00,6f,00,67,00,72,00 ,61,00,6d,00,46,00,69,00,6c,\
00,65,00,73,00,25,00,5c,00,57,00,69,00,6e,00,64,00 ,6f,00,77,00,73,00,20,00,\
4d,00,65,00,64,00,69,00,61,00,20,00,50,00,6c,00,61 ,00,79,00,65,00,72,00,5c,\
00,77,00,6d,00,70,00,6c,00,61,00,79,00,65,00,72,00 ,2e,00,65,00,78,00,65,00,\
22,00,20,00,2f,00,50,00,6c,00,61,00,79,00,20,00,22 ,00,25,00,4c,00,22,00,20,\
00,00,00

[HKEY_CLASSES_ROOT\SystemFileAssociations\video]
"ThumbnailCutoff"=dword:00000000
"Treatment"=dword:00000003
[HKEY_CLASSES_ROOT\SystemFileAssociations\video\Def aultIcon]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00 ,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00 ,32,00,5c,00,77,00,6d,00,\
70,00,6c,00,6f,00,63,00,2e,00,64,00,6c,00,6c,00,2c ,00,2d,00,37,00,33,00,30,\
00,00,00
[HKEY_CLASSES_ROOT\SystemFileAssociations\video\Ope nWithList]
[HKEY_CLASSES_ROOT\SystemFileAssociations\video\Ope nWithList\WMPlayer.exe]
@=""
"OpenWithExclude"="QT:MOV"
[HKEY_CLASSES_ROOT\SystemFileAssociations\video\She llEx]
[HKEY_CLASSES_ROOT\SystemFileAssociations\video\She llEx\ContextMenuHandlers]
[HKEY_CLASSES_ROOT\SystemFileAssociations\video\She llEx\ContextMenuHandlers\ShellVideoSlideshow]
@="{E598560B-28D5-46aa-A14A-8A3BEA34B576}"
[HKEY_CLASSES_ROOT\SystemFileAssociations\video\She llEx\ContextMenuHandlers\WMPAddToPlaylist]
@="{F1B9284F-E9DC-4e68-9D7E-42362A59F0FD}"
"CheckSupportedTypes"=""
[HKEY_CLASSES_ROOT\SystemFileAssociations\video\She llEx\ContextMenuHandlers\WMPPlayAsPlaylist]
@="{CE3FB1D1-02AE-4a5f-A6E9-D9F1B4073E6C}"
"CheckSupportedTypes"=""

[HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Explorer\FileExts\.FLV]
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Explorer\FileExts\.FLV\OpenWithList]
"a"="ieuser.exe"
"MRUList"="a"
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Explorer\FileExts\.FLV\OpenWithProgids]
"flv_auto_file"=hex(0):

--------------------


Now the problem:
when I select multiple FLV files to be added to WMP11 playlist (using
WMP button on window-bar) only the first file gets added ignoring the
multiple selection... What's the wrong in the extension definition and
what's missing to work properly, just like a normal WMV recognized as a
valid 'Audio/Video file...." instead of a plain "FLV file"?
Sorry but I'm a newbie about these things...


--
hexaae

laptop compaq/hp presario f500ea, vista home basic (sp1, x86, ita), 2gb
ram, geforce go 6100 (forceware 156.87).