trim and insert

[hidden_intuition]

I have a block that is a C L for a center line and would like to trim the polyline away from it after I insert it. I know this can be done but I have no idea how to make it work. Maybe some type of circle or something around where I insert it and then trim out the inside of the circle, then erase the circle. I'm not quite sure how to accomplish what I need. Could someone please help me with this?

[tader1]

does this work on a block?
vla-getboundingbox

[gnarlytreeman]

if you block wipeout into the centerline block behind the text when you place it in drawing it has the effect you describe and it's easier to achieve