Window-Creation Functions (3.1)
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 AdjustWindowRect    Computes the required size of a window rectangle
 AdjustWindowRectEx  Computes the required size of a window rectangle
 CreateWindow        Creates an overlapped, pop-up, or child window
 CreateWindowEx      Creates an overlapped, pop-up, or child window
 DefDlgProc          Provides default window message processing
 DefFrameProc        Provides default MDI frame window message processing
 DefMDIChildProc     Provides default MDI child window message processing
 DefWindowProc       Calls the default window procedure
 DestroyWindow       Destroys a window
 GetClassInfo        Returns window class information
 GetClassLong        Retrieves a long value from extra class memory window class
 GetClassName        Retrieves class name of a window
 GetClassWord        Retrieves a word value from extra class memory window class memory word
 GetLastActivePopup  Determines most recently active pop-up window
 GetWindowLong       Retrieves a long value from extra window memory
 GetWindowWord       Retrieves a word value from extra window memory
 RegisterClass       Registers a window class
 SetClassLong        Sets a long value in extra class memory
 SetClassWord        Sets a word value in extra class memory
 SetWindowLong       Sets a long value in extra window memory
 SetWindowWord       Sets a word value in extra window memory
 UnregisterClass     Frees a window class
 ChangeProc          Automatically SubClass a Window
 RestProc            Automatically UnSubClass a Window