import type { EXTENDED_NAME_FORMAT } from './consts.js';
/**
 * Retrieves the name of the user associated with the current thread.
 *
 * https://learn.microsoft.com/en-us/windows/win32/api/secext/nf-secext-getusernameexw
 */
export declare function GetUserNameEx(nameFormat: EXTENDED_NAME_FORMAT): string | null;