error codes are values that identify different types of errors in the Windows API. Most functions do not report the error code directly; instead, they simply return a flag specifying if some error occured or not.
these are samples, not complete applications. The code (and coding style) is not meant to be industrial strength; it's not even well-designed. The sole purpose of the samples is illustrating a point, not teaching proper coding style.
Speech for Windows® applications, includes freely distributable text-to-speech engines (in U.S. English and Simplified Chinese) and speech recognition engines (in U.S. English, Simplified Chinese, and Japanese).
The Google Maps JavaScript API lets you embed Google Maps in your own web pages. To use the API, you need to sign up for an API key, and then follow the instructions below.