Use the_widget() inside functions.php

Hi .

I’m trying to create a shortcode with some html and a widget, but the widget is printing outside the divs. I think I can’t use the_widget(), the right way would be get_widget(), but doesn’t exists any get_widget()…

The widget it’s showing before my divs.

My code:

// Calendar shortcode

function calendarevents_function()
{
	$a1 = "<div class='parallax-img content-area'><div class='site-content' role='main'><div class='entry-content'>";
	$a2= "</div></div></div>";

return ($a1.the_widget('TribeEventsMiniCalendarWidget').$a2);
}

add_shortcode('calendarevents', 'calendarevents_function');

Any suggestions?