Для добавления регистрации dll в контекстное меню скопируйте в блокнот и сохраните файл с расширением reg
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\dllfile\Shell]
[HKEY_CLASSES_ROOT\dllfile\Shell\Register]
[HKEY_CLASSES_ROOT\dllfile\Shell\Register\command]
@="regsvr32.exe \"%1\""
[HKEY_CLASSES_ROOT\dllfile\Shell\UnRegister]
[HKEY_CLASSES_ROOT\dllfile\Shell\UnRegister\command]
@="regsvr32.exe /u \"%1\""
[HKEY_CLASSES_ROOT\Applications\regsvr32.exe]
[HKEY_CLASSES_ROOT\Applications\regsvr32.exe\shell]
[HKEY_CLASSES_ROOT\Applications\regsvr32.exe\shell\Register]
[HKEY_CLASSES_ROOT\Applications\regsvr32.exe\shell\Register\command]
@="regsvr32.exe \"%1\""
[HKEY_CLASSES_ROOT\Applications\regsvr32.exe\shell\UnRegister]
[HKEY_CLASSES_ROOT\Applications\regsvr32.exe\shell\UnRegister\command]
@="regsvr32.exe /u \"%1\""
