what's the differences between .dll , .lib, .h files ?

Question

why in a project should include some *.lib, .h or some other files ? and what are these things used for ?

Answer 1

• H Declares the interface to a library - including functions, structures, and constants. Written in the C language.
• LIB Either declares the binary interface to a dynamic library (DLL) or contains the binary code of a library.
• DLL A dynamic library - your application shares these with the system or you use them to keep your code base organized.
• DEF A textual description of functions exported by a DLL.

Answer 2

.h : header file, its a source file containing declarations (as opposed to .cpp .cxx etc. containing implementations)

.lib : static library may contain code or just links to a dynamic library. either way it's compiled code that you link with your program. The static library is included in your .exe at link time.

.dll : dynamic library. Just like a static one but you need to deploy it with your .exe file because its loaded at run time