[Microstation CE Update 16 C#] : How to create line at an offset distance using Accudraw?

I want to create a parallel line at an offset distance with Accudraw using C#. I give an offset distance, select the point on the line and then the point on desired side of the line through click and then draw the line by dragging the mouse from the point at offset distance.

I can also use COPY PARALLEL but with this I will be able to create a single line of desired length.

Thanks,