In computer programming a window class is a structure fundamental to the Microsoft Windows (Win16, Win32, and Win64) operating systems and its Application Programming Interface (API).
The structure provides a template, from which windows may be created, by specifying a window's icons, menu, background color and a few other features. It also holds a pointer to a procedure that controls how the window behaves in response to user interaction. It finally tells the operating system how much additional storage space is needed for the class itself and for each window created from it.
There have been two versions of window classes; the only non-technical addition brought by the second one is that of a small additional icon for the window. The first version was present in the Windows 3.x series; the second version appeared in Windows 95 and Windows NT 3.1.
Famous quotes containing the words window and/or class:
“Then is what you see through this window onto the world so lovely that you have no desire whatsoever to look out through any other window?—and that you even make an attempt to prevent others from doing so?”
—Friedrich Nietzsche (1844–1900)
“History is full, down to this day, of the imbecility of kings and governors. They are a class of persons much to be pitied, for they know not what they should do.”
—Ralph Waldo Emerson (1803–1882)