Subj : Re: Determine if a dll supports a certain call/has a certain function
To   : borland.public.cpp.borlandcpp
From :  Bruce Salzman
Date : Tue Dec 21 2004 10:47 am

> I've never loaded a DLL dynamically before. Is it possible if a DLL 
> is
> simply linked into the application (not loaded dynamically) to
> determine from a calling programe that a certain function is
> available?
>
All DLLs are dynamically loaded. Implicitly linked DLLS are linked to 
your app with an export library. The exported functions are located 
for you when Windows loads the DLL. An explicitly loaded DLL is loaded 
with LoadLibrary(). You can call GetProcAddress() to see if the 
function you want is exported.

> What I'm trying to solve is add a function to a dll, but not have it
> blow up if an older NOP dll is in place in the executable directory.

I think the older program should be OK if you don't change whatever it 
is looking for. Adding new exports won't break that.

Regards,
Bruce

.