[RESOLVED] Is it possible to integrate VB 6.0 DLL to other Applications?

I just like to ask something if it would be possible to use Active X DLL in VB 6.0 with other applications. So that when I open/Install an application, files or folder, my form will show up first to generate a login password... If I create a notepad "Test.txt" and a DLL in the same folder. Notepad will call on the DLL to open a form password?!