[Lazarus] Where do lazarus apps look for dll's?

[payl]

> (How) can the calling program know about the "bittiness" of a dll / so  
> it tries to load ?
http://msdn.microsoft.com/en-us/library/windows/desktop/ms680313(v=vs.85).aspx

There is just field that tells what is architecture of file. This applies  
both to EXE and DLL.
You can see msdn has x86,x64 and itanium there, but there are many more  
existing.
In Linux situation is same, it also uses COFF and this field (AFAIK).