Windows API (Windows Application)
use:
Microsoft Windows Application Interface is an interface program that provides developers when developing a Windows application, including Windows XP, Windows 2000, Windows NT, Winows 95/98, and Windows Me. You can give you Applications Some graphics device interfaces (GDI) show some graphics and formatted texts; you can also manage some system objects such as memory, files, and processes (see "Process".
Application Environment: Windows API can be used in all applications that are Windows platforms, no matter whether it is 32-bit or 64-bit Windows systems usually supports the same functional function. (Translation: API is usually called by the developer in a functional form.)
Note: In the following articles, there are some translation articles on the user interface, graphics device interface, all from MSDN. The first time I tried to translate, there is a lot of sureness, and there are more than one.