Are there two kinds of .dll files in Windows?

I know that some dll files have to be registered with the regsvr32 command. I tried that on a dll files I got and got an error message saying that "the entry-point DLLRegister开发者_开发问答Server was not found." I heard that to use theis dll file you have to use "ctypes." So what are you supposed to do with it?

Some DLLs contain COM interfaces. These can be registered, and provide hooks to do so. Others are just normal DLLs, and have entry points with names and/or ordinals. They must be linked appropriately by the script/executable.