How to find out if a dll is registered or not ?

I found this:
http://www.developerfusion.co.uk/show/3479/
and another idea:
http://experts.about.com/q/Visual-Basic-1048/DLL-OCX-Registered.htm
and another thread:
http://forums.winamp.com/showthread.php?threadid=181974 (didn't read throu)

you could also try to move the dll, or to rename it and trap error

Have you checked out the tip on my site:

http://users.adelphia.net/~rllibby/delphitips/tip8.html

regarding programmatically registering / unregistering a library? You can use this class to determine if a dll exposes the required functions, and there is no problem with unregistering a library that is not registered (most just remove any registry keys they created). The functions return an HRESULT (no error messages, exceptions), so you choose how you want to handle the return, if at all.

Regards,
Russell

Ciuly thanks, i've read the articles, the source code in DeveloperFusion (Is it in C ?)
probably talks about looking if a dll can be loaded, if it is available...(Maybe i'm wrong...).
But mine is a windows component, its available.
I'd like to learn the current state.

Russell i've tracked the registry changes (registering/unregistering the dll)...
You are right, i can do without regsrv. I can just change the registry keys with you "RegTransfer" unit.

Just to be on the safe side i'd like to try COMREG unit ...
Can you give me an example of how to :
Check if it is available, load it and unload it ?

Thanks :)

Thank you both :)

Russell it works perfect, i can handle the messages now which is good :)
But more or less it does the same thing as the code in DeveloperFusion, it checks
for the existence of the file...
If it manage to load it then ok it exists... Anyway i can track it through registry and then load itwith your
unit  :)