How to use variables created inside a hook

[sv1cec]

I have created a hook, attached at location showthread_postbit_create, in showthread.php. The code in the hook does some calculations and returns some values to some variables, let's call them $show1, $show2 etc.

At the end of the hook, I check the variables, by echoing them, and they are correct. However, when I try to use them inside postbit template, they are empty. Is there a specific way to call these variables? I even tried making them global, still no luck.

Rgds and tnx