/**
 * Gets the ID of the control that has keyboard focus in a window.
 *
 * @param windowHandle The handle of the window to access.
 *
 * @returns The ID of the control that has keyboard focus.
 *
 * @example
 * ```typescript
 * import { ControlGetFocusByHandleSync, WinGetHandleSync } from '@ahmic/autoit-js';
 *
 * const windowHandle = WinGetHandleSync('Untitled - Notepad');
 *
 * const id = ControlGetFocusByHandleSync(windowHandle);
 *
 * console.log(id); // Output: "Edit1"
 * ```
 *
 * @see https://www.autoitscript.com/autoit3/docs/functions/ControlGetFocus.htm
 */
export declare function ControlGetFocusByHandleSync(windowHandle: bigint): string;
/**
 * Gets the ID of the control that has keyboard focus in a window.
 *
 * @param windowHandle The handle of the window to access.
 *
 * @returns A promise that resolves to the ID of the control that has keyboard focus.
 *
 * @example
 * ```typescript
 * import { ControlGetFocusByHandle, WinGetHandle } from '@ahmic/autoit-js';
 *
 * const windowHandle = await WinGetHandle('Untitled - Notepad');
 *
 * const id = await ControlGetFocusByHandle(windowHandle);
 *
 * console.log(id); // Output: "Edit1"
 * ```
 *
 * @see https://www.autoitscript.com/autoit3/docs/functions/ControlGetFocus.htm
 */
export declare function ControlGetFocusByHandle(windowHandle: bigint): Promise<string>;