Apply new color to layers

Hello!

I would like to create a script in javascript  for Photoshop CC that does the following:

1) Check each layer in the current document

2) If the layer is named "fillMe" then color it in a specific color but lock the transparent pixels (in German it's called "Transparente Pixel fixieren")

I imagine that there might be several ways to go about this. Maybe applying a "Color Overlay" layer style with the desired color would work.

I have tried to find a good solution but cannot find any information on how to lock the pixel transparency with code. Also I would like to access a color picker window for the color selection.

Could you kindly direct me to the right tutorials/resources?

Thank you in advance!

Edit: So far I have got this with the help of the Script Listener, but it won't run as "this function might not be available in the new version of Photoshop"

function showBounds(layerNode) {   

    for (var i=0; i<layerNode.length; i++) {

        showBounds(layerNode[i].layerSets);

        for(var layerIndex=0; layerIndex < layerNode[i].artLayers.length; layerIndex++) {

            var layer=layerNode[i].artLayers[layerIndex];

            if (layer.name == "fillMe") {

                layer.visible = 1;

                layer.transparentPixelsLocked = 1;

                var idFl = charIDToTypeID( "Fl  " );

                var desc8 = new ActionDescriptor();

                var idUsng = charIDToTypeID( "Usng" );

                var idFlCn = charIDToTypeID( "FlCn" );

                var idFrgC = charIDToTypeID( "FrgC" );

                desc8.putEnumerated( idUsng, idFlCn, idFrgC );

                executeAction( idFl, desc8, DialogModes.NO );

            }   

        }

    }

}

showBounds(app.activeDocument.layerSets);