Software Development Kit (SDK)
It is a set of tools designed to help C programmers create Windows applications.
Windows SDK consists of the large set of books describing functions, messages, structures, macros and resources .There are also tools including a dialog editor and an image editor, on-line help files and a set of windows libraries and header files. It has large collection of API functions written in C.
What is an API?
API is an acronym...
Win32 vs. MFC