private static int registryGetIntValue( String key, String valueName, int defaultValue ) {
		try {
			return Advapi32Util.registryGetIntValue( HKEY_CURRENT_USER, key, valueName );
		} catch( RuntimeException ex ) {
			return defaultValue;
		}
	}
Tell the window whether the application wants to use custom decorations.
If {@code true}, the Windows 10 title bar is hidden (including minimize,
maximize and close buttons), but not the resize borders (including drop shadow).
flatlaf-natives/flatlaf-natives-jna/src/main/java/com/formdev/flatlaf/natives/jna/windows/FlatWindowsNativeWindowBorder.java