摘要
本文介绍了在ＶＢ５．０中，通过调用 Ｗｉｎｄｏｗｓ ＡＰＩ函数来实现对多媒体、图形设备的访问等，并详述了 ＡＰＩ函数的涵义及其使用方法，注意事项以及如何运用ＡＰＩ函数编写程序、优化程序，提高编程效率的典型实例．
The paper introduces how to make a visit of an operation system and drawing apparatus by using Windows API function in VB5. 0. It also specifies the definition of API function and its ways of application, note points and how to use API function to prepare and optimize a computer program, and improve the efficiency of doing it by examples.
