Select Sketch Line by ID and Change Length (VBA)

Hi, hoping someone can help me out with this.

I want to be able to set the ID / Tag of a sketch line on a Sheet Format (I will need to set the same ID for the equivalent line on multiple sheet formats).

I then need another macro to be able to select the line using the ID and change it's length.

I have been able to add tags to notes previously using this: Add Tag to selected note using SOLIDWORKS API (codestack.net) and then update the notes using a version of this: Macro feature to increment the numeric value in the note via SOLIDWORKS API (codestack.net)  I want to be able to do the same for a line on a template / sheet format but can't seem to get it to work.

It would be great if anyone could help on either setting an ID for a line or changing the length of a line using its ID, I've exhausted google at this stage.

Thanks in advance,

Diarmaid

SolidworksApi/macros