If you use the link I provided in my previous post and click "setup" on the right side, the instructions are clearly outlined there for audio devices, as well as for TVs.
However, there is no option for Bomaker, so in order to get a code you need to find the equivalent manufacturer by contacting Bomaker, or contact URC to see if they have a code for you. If the "search" didn't work, then there may not be a code that works.
One other thought. If the soundbar has an HDMI connection, it may be HDMI-CEC compatible, in which case if you turn on HDMI-CEC, on your TV, your Rogers box, and the soundbar, they may all turn on automatically.