In order to load a slider instance in a lightbox you need to do two things:
- insert the [slider_pro_lightbox] shortcode in the post/page where the lightbox will be opened
- add the "slider-pro-lightbox-ID" class to the element that will open the lightbox; the ID from the class represents the ID of the slider
[slider_pro_lightbox id="3"] <a class="slider-pro-lightbox-3">Click Me</a>
If you need a PHP method to load the lightbox slider, you can use the "slider_pro_lightbox()" call, as seen in the code below:
Also, when using the PHP method, you must set the slider's "Include Skin" option (from the "General" panel) to true.