W

white-space character::A space, tab, line-feed, carriage-return, form-feed, vertical-tab, or newline character.

window::An imaginary rectangle on the screen where output takes place. See “text window” and “window coordinates.”

window class::A template that defines the attributes of a window, such as the shape of the window's cursor and the name of the window's menu. It also specifies the window function that processes messages for all windows in the class.

window coordinates::The coordinate system defined by the programmer.

window function::A function that deals with window-management messages that affect a particular window and must be responded to appropriately. These messages either specify actions for the function to carry out or are requests for information from the function.

WinMain function::The function which takes the place of the main function in a Windows program.

WYSIWYG::The acronym for “what you see is what you get.”