Loop Until Active Cell is in a specific column?

So my code just keeps looping off into the infinite column so my syntax must be off.

Basically I have a loop that moves from one column to the next (on the same row) but I want to tell the loop to stop once it reaches Column CE.

I tried "Loop Until activecell.column = CE"

but that's giving me a type mismatch.

Thanks!

Is there a way to quickly identify what number a column is? Can I switch them from being letters to showing up as numbers? Or do I just have to count out by hand?