When the explorer detached the dll which is for shell namespace extension on win Xp?

Question

I found that: the dll was detached(process) when I close the window(opend shell namespace externsion), but sometime didn't.

There are some global object in my dll. so, I want to find out when the dll be detached(process).

Answer 1

If you export the DllCanUnload function from your DLL you will be called when Explorer wants to unload your DLL. You can block it if you want, or perform some clean-up before allowing the unload.