[原文] 
  
  That is correct. A BPL is a DLL. (But not all DLLs are BPLs.) 
  
   But I still found some different, such as that I can create a 
   object from the Host exe and that pass to a BPL and modify it safely, but 
   if I do same to a dll, I can not modify any referenced property of the object. 
  
  When you use packages, there is only ever one copy of any unit in 
  memory. One copy of Forms, one copy of SysUtils, one copy of System 
  (well, most of it), one copy of StdCtr...[ 查看全文 ]