load-{$page_hook}

The load-* hook fires in a number of contexts. This hook is for plugin screens where a callback is provided when the screen is registered. The dynamic portion of the hook name, $page_hook, refers to a mixture of plugin page information including:

1. The page type. If the plugin page is registered as a submenu page, such as for Settings, the page type would be 'settings'. Otherwise the type is 'toplevel'.
2. A separator of 'page'.
3. The plugin basename minus the file extension. Together, the three parts form the $page_hook. Citing the example above, the hook name used would be 'load-settings_page_pluginbasename'.

// rejestracja funkcji zwrotnej
add_action( 'load-{$page_hook}', 'twoja_funkcja' );

function twoja_funkcja($param_1) {
	// Twój kod
}