How to save the Line position in " Mechanical Assembly Example" due to I have many models

Hello !!

   I just learned the VB using vision tool. 

   In the  " Mechanical Assembly Example"  using the VB6.

   We can detect the mising part using the edge line detection.

   With 1 model is ok, but i want to detect many model for our parts.

   But I can not save the line detect for model by model.

   Can you help me how to save  the edge Line detection position for model by model.

   Because with 1 model, I can insert lines to detect part, but when I closed my sofware, it can not save my line.

    And if we have many model, how I can change data by model.

   By support me with source code for example.

  Thanks.