Hi Lyndel,
please excuse me for my late reply.

I've got it working as follows :

...............

case "F4":
lblid = "HS-2";
if (value == 0) { widget("CURRENTICON").setImage(CF.widget("Moon","RECOURCES").getImage(0),0);
return; } else
if (value == 100) { widget("CURRENTICON").setImage(CF.widget("Sun","RECOURCES").getImage(0),0);
return; };
break;
...................

It shows the icon "Moon" or "Sun" in a panel with the
tag "CURRENTICON) depending on the value.
The values are provided from a little server installed on my HomeSeer HA system and its possible to get other values to show different weather icons.

Regards,
Fischi