For visual Windows programmers straining to unleash the incredible hidden power of the Windows API (that vast collection of functions that perform every task within a Windows application) without being overwhelmed, here is the essential guide. It addresses only the most common and useful API's in the three most popular visual language environments-Visual Basic, Delphi, and PowerBuilder-as well as the Internet (Java). Using a task approach with real-world examples for each language, the author shows readers how communicate with the API-decipher the ways that Windows "talks to itself" -explore key API functionalities-access debugging, mail, Internet, and other on-demand functions-find additional resources, online and elsewhere-and much more.