Dll

Hi every body ...

since 2 years ago I have been looking for a tutorial about DLLs...
I dont mean how can I create a DLL ...
whay I mean is "The DLL structure" how it is emplimented technicaly ... and to what extend its secure ...

and I mean by secure here that no one can decompile it .. no one can see the code .....

What is the interface part ... or the header .. .. and what does it have to do with API and COM or even .NET ...

A DLL is exactly like an EXE except it doesn't have an entry point. In fact, you can change the extension of an EXE to DLL and then other executables can use its public types just like any other DLL. The compiled entry point is just ignored. That's the case with .NET assemblies anyway. I'm not sure if non-.NET execuatbles are the same but I'd imagine so.