The OpenIcon function restores a minimized (iconic) window to its previous size and position; it then activates the window.
BOOL OpenIcon(
HWND hWnd // handle to window
);
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.
OpenIcon sends a WM_QUERYOPEN message to the given window.
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, CloseWindow, IsIconic, ShowWindow