How to add an external library?

Hello, I would like to ask for some help how to use an external library in basic4ppc desctop. I think, I am doing everything correctly.
1. Go to Tools menu
2. Go to Components
3. Click on "DLL". Dialog opens asking for the library dll. I select for example controlsex.dll. After that I receive the message that dll was copied to the basic4ppc folder. The controlsex dll is now displayed in the components screen.
4. I click OK button and exit the "Components" screen. I am back to the main application screen.
Now, if I understand correctly I have to go to "Tools" / "Add object" menu to create the object, however "Add object" menu item is unavailable. So no metter what I try, the "Add object" is always unavailable.
I am not sure, what I am doing wrong. Looks like I am missing some step, however can not figure out what.
Would greatly appreciate any help.

Thanks in advance.

Did you add the dll to both the desktop and the device:

Thanks, Erel, After adding the dll to both desctop and device the "Add object" became available and I could use it. Thanks so much!