Need help for thinking a best way for create a 'electric' line

[AubelecBE]

Hello.

I use autocad 2015 only (not the Autocad Electrical 2015).

i need to create a similar behavior  of create a line with simulat a electrical string.

i want create a little vb.net for create a schema of fuse box.

i know how to add xdata of a line but how i can for example add a new line and of the interception add a point ?

i dont know how to start for this.

see the image below.

[khoa.ho]

Your question may be not clear enough. But for the complicated symbol, it is better to have it as a block or dynamic block for dynamic behaviors. A symbol saves more lines of code. The code will drive symbols and entity intersections. I am not sure about your requirements but from the image, I guess it can be presented as a block attached to a line at a certain point.