import { type ATOM, type HINSTANCE, type HWND } from '../ctypes.js';
import { type WNDCLASS, WNDCLASSEX } from '../structs.js';
/**
 * Retrieves information about a window class.
 *
 * Note: libwin32 only supports querying by class name (string).
 *
 * https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getclassinfow
 */
export declare function GetClassInfo(hInstance: HINSTANCE | null, className: string): WNDCLASS | null;
/**
 * Retrieves information about a window class, including a handle to the small icon associated with the window class.
 *
 * Note: libwin32 only supports querying by class name (string).
 *
 * https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getclassinfoexw
 */
export declare function GetClassInfoEx(hInstance: HINSTANCE | null, className: string): WNDCLASSEX | null;
/**
 * Retrieves the name of the class to which the specified window belongs.
 *
 * https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getclassnamew
 */
export declare function GetClassName(hWnd: HWND): string | null;
/**
 * Registers a window class for subsequent use in calls to the CreateWindow function.
 *
 * https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-registerclassw
 */
export declare function RegisterClass(wndClass: WNDCLASS): ATOM | null;
/**
 * Registers a window class for subsequent use in calls to the CreateWindowEx function.
 *
 * https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-registerclassexw
 */
export declare function RegisterClassEx(wndClassEx: WNDCLASSEX): ATOM | null;
/**
 * Unregisters a window class, freeing the memory required for the class.
 *
 * Note: despite the parameter being named `className`, as in the native API,
 *       libwin32 only supports unregistering by ATOM -- the one you received
 *       from RegisterClass/RegisterClassEx.
 *
 * https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-unregisterclassw
 */
export declare function UnregisterClass(className: ATOM, hInstance?: HINSTANCE | null): boolean;