The CloseWindow function minimizes (but does not destroy) the specified window.
BOOL CloseWindow(
HWND hWnd // handle to window to minimize
);
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
The window is minimized by reducing it to the size of an icon and moving the window to the icon area of the screen. The system displays the window's icon instead of the window and draws the window's title below the icon.
To destroy a window, an application must use the DestroyWindow function.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in winuser.h.
Import Library: Use user32.lib.
Windows Overview, Window Functions, ArrangeIconicWindows, DestroyWindow, IsIconic, OpenIcon