Function WinExistsByHandleSync

WinExistsByHandleSync(windowHandle: bigint): boolean
Checks if a window exists.
Parameters
- windowHandle: bigint
  The handle of the window to search for.
Returns boolean
True if the window exists, false otherwise.
Example
```
import { WinExistsByHandleSync, WinGetHandleSync } from '@ahmic/autoit-js';

const handle = WinGetHandleSync('Untitled - Notepad');
const exists = WinExistsByHandleSync(handle);

console.log(exists); // Output: true or false
```
See
https://www.autoitscript.com/autoit3/docs/functions/WinExists.htm
- Defined in win-exists-by-handle.ts:23