c# - Register context menu verbs for specific file types -

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i'm registering extended verbs video file types on system doing this:

        foreach (var ext in filetypes.videotypes)         {             var progid = registry.getvalue($@"hkey_classes_root\.{ext}", null, null);              if (progid == null)             {                 continue;             }              registry.setvalue(                 $@"hkey_current_user\software\classes\{progid}\shell\dlsub",                 null,                 "download subtitle");              registry.setvalue(                 $@"hkey_current_user\software\classes\{progid}\shell\dlsub\command",                 null,                 @"""d:\myapp.exe"" ""%1""");         }

resulting in (mpeg_auto_file mkv):

[hkey_classes_root\mpg_auto_file\shell\dlsub] @="download subtitle"  [hkey_classes_root\mpg_auto_file\shell\dlsub\command] @="\"d:\\myapp.exe\" \"%1\""

and mplayerc.mp4 mp4:

[hkey_classes_root\mplayerc.mp4\shell\dlsub] @="download subtitle"  [hkey_classes_root\mplayerc.mp4\shell\dlsub\command] @="\"d:\\myapp.exe\" \"%1\""

the problem registered verb shows mkv (and couple of other filetypes), context menus other file types (like mp4) unaffected. adding verb hkey_classes_root\*\shell work these filetypes, not want!

any ideas on difference between these filetypes? perhaps has registered progid (all mplayerc types not seem work...).

the default value (aka progid) can found specific file extension doesn't point correct class (the 1 affect menu entries). during tests, on fresh copy of windows 10 - wmp11.assocfile.avi progid .avi file extension, when added entry in wmp11.assocfile.avi\shell\ (either hkey_local_machine or hkey_current_user) didn't affect menu @ all. give found hkey_classes_root\.avi\openwithprogids store few more values, including wmp11.assocfile.avi other starts word app, i.e. appx6eg8h5sxqq90pv53845wmnbewywdqq5h. editing shell\ one, able add menu entry. downside - affected other file extensions somehow linked appx6eg8h5sxqq90pv53845wmnbewywdqq5h. couldn't accept solution force me iterate through classes found in openwithprogids, plus menu entry had shown specific file extensions , not other. decided go hkey_classes_root\*\shellex , dlls create menu entry dynamically, based on clicked file type (check extension).


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