Text entry Box as search box

Here is a way to make it work with a prompt, just execute this JS with a button:

var myTitle = prompt("Please enter a slide title", "");

if ( myTitle !== null || myTitle !== "")
{
var res = cp.model.data.project_main.slides.split( ',' );
res.forEach( checkLabel);
}

function checkLabel(item, idx)
{
if ( cp.model.data[ item ].lb === myTitle )
{
cpCmndGotoSlide = idx;
}
}

There is no advanced action that you can easily set up to make text entered into a TEB automatically jump the user to slides that contain the search term.  It would require having a very large and complex Conditional Advanced Action.  JavaScript would be a better option but then you would need the services of a JavaScript programmer.

But... if you are using the standard Captivate TOC, then you have the option in the TOC settings to turn on the Search box in the TOC.

This at least will highlight any items in the TOC that might match your keyword.