About Window Classes
Each window class has an associated window procedure shared by all windows of
the same class. The window procedure processes messages for all windows of that
class and therefore controls their behavior and appearance. For more
information, see
Window Procedures.
An application must register a window class before it can create a window of
that class. Registering a window class associates a window procedure, class
styles, and other class attributes with a class name. When an application specifies
a class name in the
CreateWindow or
CreateWindowEx function, the operating system creates a window with the window procedure,
styles, and other attributes associated with that class name.
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MegaDetailed.Net
Unix Manual Pages
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